chore(refactor): use list instead of array naming, custom iter for types, indent latex

## Details

Mostly a refactor but does include a latex functional change.

Anywhere we use array replace it with list since that's what various
neovim functions use.

Create an `iter` module with `map` and `filter` setup in such that the
lua language server automatically infers function arguments and out
correctly.

For latex pad the output such that it lines up with the column of the
input formula, should be mildly nicer than always at the start.

Author: MeanderingProgrammer

README.md

@@ -247,32 +247,32 @@ require('render-markdown').setup({
         position = 'overlay',
         -- Replaces '#+' of 'atx_h._marker'
         -- The number of '#' in the heading determines the 'level'
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         icons = { '󰲡 ', '󰲣 ', '󰲥 ', '󰲧 ', '󰲩 ', '󰲫 ' },
         -- Added to the sign column if enabled
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         signs = { '󰫎 ' },
         -- Width of the heading background:
         --  block: width of the heading text
         --  full:  full width of the window
-        -- Can also be an array of the above values in which case the 'level' is used
-        -- to index into the array using a clamp
+        -- Can also be a list of the above values in which case the 'level' is used
+        -- to index into the list using a clamp
         width = 'full',
         -- Amount of margin to add to the left of headings
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
         -- Margin available space is computed after accounting for padding
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         left_margin = 0,
         -- Amount of padding to add to the left of headings
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         left_pad = 0,
         -- Amount of padding to add to the right of headings when width is 'block'
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         right_pad = 0,
         -- Minimum width to use for headings when width is 'block'
-        -- Can also be an array of integers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of integers in which case the 'level' is used to index into the list using a clamp
         min_width = 0,
         -- Determins if a border is added above and below headings
         border = false,
@@ -284,7 +284,7 @@ require('render-markdown').setup({
         above = '▄',
         -- Used below heading for border
         below = '▀',
-        -- The 'level' is used to index into the array using a clamp
+        -- The 'level' is used to index into the list using a clamp
         -- Highlight for the heading icon and extends through the entire line
         backgrounds = {
             'RenderMarkdownH1Bg',
@@ -294,7 +294,7 @@ require('render-markdown').setup({
             'RenderMarkdownH5Bg',
             'RenderMarkdownH6Bg',
         },
-        -- The 'level' is used to index into the array using a clamp
+        -- The 'level' is used to index into the list using a clamp
         -- Highlight for the heading and sign icons
         foregrounds = {
             'RenderMarkdownH1',
@@ -323,7 +323,7 @@ require('render-markdown').setup({
         -- Amount of padding to add around the language
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
         language_pad = 0,
-        -- An array of language names for which background highlighting will be disabled
+        -- A list of language names for which background highlighting will be disabled
         -- Likely because that language has background highlights itself
         disable_background = { 'diff' },
         -- Width of the code block background:
@@ -373,7 +373,7 @@ require('render-markdown').setup({
         enabled = true,
         -- Replaces '-'|'+'|'*' of 'list_item'
         -- How deeply nested the list is determines the 'level'
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         -- If the item is a 'checkbox' a conceal is used to hide the bullet instead
         icons = { '●', '○', '◆', '◇' },
         -- Padding to add to the left of bullet point
@@ -587,11 +587,11 @@ require('render-markdown').setup({
 
 </details>
 
-We use the following definitions when discussing indexing into arrays:
+We use the following definitions when discussing indexing into lists:
 
 1. Cycle: Indexed `mod` the length.
    Example: `{ 1, 2, 3 }` @ 4 = 1.
-2. Clamp: Indexed normally but larger values use the last value in the array.
+2. Clamp: Indexed normally but larger values use the last value in the list.
    Example: `{ 1, 2, 3 }` @ 4 = 3.
 
 ## Headings
@@ -615,32 +615,32 @@ require('render-markdown').setup({
         position = 'overlay',
         -- Replaces '#+' of 'atx_h._marker'
         -- The number of '#' in the heading determines the 'level'
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         icons = { '󰲡 ', '󰲣 ', '󰲥 ', '󰲧 ', '󰲩 ', '󰲫 ' },
         -- Added to the sign column if enabled
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         signs = { '󰫎 ' },
         -- Width of the heading background:
         --  block: width of the heading text
         --  full:  full width of the window
-        -- Can also be an array of the above values in which case the 'level' is used
-        -- to index into the array using a clamp
+        -- Can also be a list of the above values in which case the 'level' is used
+        -- to index into the list using a clamp
         width = 'full',
         -- Amount of margin to add to the left of headings
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
         -- Margin available space is computed after accounting for padding
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         left_margin = 0,
         -- Amount of padding to add to the left of headings
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         left_pad = 0,
         -- Amount of padding to add to the right of headings when width is 'block'
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
-        -- Can also be an array of numbers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of numbers in which case the 'level' is used to index into the list using a clamp
         right_pad = 0,
         -- Minimum width to use for headings when width is 'block'
-        -- Can also be an array of integers in which case the 'level' is used to index into the array using a clamp
+        -- Can also be a list of integers in which case the 'level' is used to index into the list using a clamp
         min_width = 0,
         -- Determins if a border is added above and below headings
         border = false,
@@ -652,7 +652,7 @@ require('render-markdown').setup({
         above = '▄',
         -- Used below heading for border
         below = '▀',
-        -- The 'level' is used to index into the array using a clamp
+        -- The 'level' is used to index into the list using a clamp
         -- Highlight for the heading icon and extends through the entire line
         backgrounds = {
             'RenderMarkdownH1Bg',
@@ -662,7 +662,7 @@ require('render-markdown').setup({
             'RenderMarkdownH5Bg',
             'RenderMarkdownH6Bg',
         },
-        -- The 'level' is used to index into the array using a clamp
+        -- The 'level' is used to index into the list using a clamp
         -- Highlight for the heading and sign icons
         foregrounds = {
             'RenderMarkdownH1',
@@ -706,7 +706,7 @@ require('render-markdown').setup({
         -- Amount of padding to add around the language
         -- If a floating point value < 1 is provided it is treated as a percentage of the available window space
         language_pad = 0,
-        -- An array of language names for which background highlighting will be disabled
+        -- A list of language names for which background highlighting will be disabled
         -- Likely because that language has background highlights itself
         disable_background = { 'diff' },
         -- Width of the code block background:
@@ -786,7 +786,7 @@ require('render-markdown').setup({
         enabled = true,
         -- Replaces '-'|'+'|'*' of 'list_item'
         -- How deeply nested the list is determines the 'level'
-        -- The 'level' is used to index into the array using a cycle
+        -- The 'level' is used to index into the list using a cycle
         -- If the item is a 'checkbox' a conceal is used to hide the bullet instead
         icons = { '●', '○', '◆', '◇' },
         -- Padding to add to the left of bullet point