docs: optimized icons documentation

Author: mfranzke

assets/icons/README.md

@@ -2,8 +2,8 @@
 
 We're getting these icons by the DB Design System colleagues and process the following changes:
 
-- Minifications with `ImageOptim`
-- Adding some contents within the SVGs (these assets might get exported correctly in the future)
-  - CSS variables
-  - `id`-Attribute
-- Afterwards the JSON files within the `source/_patterns/icons` path might need to get updated
+-   Minifications with [`ImageOptim`](https://imageoptim.com/mac)
+-   Adding some contents within the SVGs (these assets might get exported correctly in the future)
+    -   CSS variables (replace `fill="#282D37"` by `fill="#282D37" style="fill: currentColor;fill: var(--db-icon-color, currentColor)"`)
+    -   `id`-Attribute (generic `icon` id within all SVG files)
+-   Afterwards the JSON files within the `source/_patterns/icons` path might need to get updated

source/_patterns/icons/functional/_functional.md

@@ -21,9 +21,9 @@ You could either use the Icon font provided with [DB UI Core](https://db-ui.gith
 
 To change the line-colors of the icon define a color value for its CSS variable:
 
-- `--db-icon-color`
+-   `--db-icon-color`
 
-The fallback for a non-defined `--db-icon-color` is the `font-color` defined around or for the `<svg>` itself.
+The fallback for an undefined `--db-icon-color` is the `font-color` defined around or for the `<svg>` itself.
 
 #### Accessibility
 

source/_patterns/icons/illustrative/_illustrative.md

@@ -23,10 +23,10 @@ You could reference the multicolor icons directly via the `<use>` HTML tag withi
 
 You could easily change the line-colors of both the pulse and the icon itself by defining different color values for both CSS variables:
 
-- `--db-icon-color`
-- `--db-icon-pulse-color`
+-   `--db-icon-color`
+-   `--db-icon-pulse-color`
 
-The fallback for a non-defined `--db-icon-color` is the `font-color` defined around or for the `<svg>` itself, and `--db-icon-pulse-color` would fall back to `#EC0016`, which is the general pulse color defined by brand.
+The fallback for an undefined `--db-icon-color` is the `font-color` defined around or for the `<svg>` itself, and `--db-icon-pulse-color` would fall back to `#EC0016`, which is the general pulse color defined by brand.
 
 #### Accessibility