Implemented sentence scope (#1595)

Fixes #19

While I was there I also sorted the textual scopes.

## Checklist

- [x] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [ ] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [ ] I have not broken the cheatsheet

---------

Co-authored-by: Pokey Rule <755842+pokey@users.noreply.github.com>

Author: AndreasArvidsson

src/modifiers/scopes.py

@@ -57,26 +57,27 @@
     "tags": "xmlBothTags",
     "start tag": "xmlStartTag",
     "end tag": "xmlEndTag",
+    # LaTeX
+    "part": "part",
+    "chapter": "chapter",
+    "subsection": "subSection",
+    "subsubsection": "subSubSection",
+    "paragraph": "namedParagraph",
+    "subparagraph": "subParagraph",
+    "environment": "environment",
     # Text-based scope types
     "char": "character",
     "word": "word",
+    "token": "token",
     "identifier": "identifier",
+    "line": "line",
+    "sentence": "sentence",
     "block": "paragraph",
-    "cell": "notebookCell",
     "file": "document",
-    "line": "line",
     "paint": "nonWhitespaceSequence",
     "short paint": "boundedNonWhitespaceSequence",
     "link": "url",
-    "token": "token",
-    # LaTeX
-    "part": "part",
-    "chapter": "chapter",
-    "subsection": "subSection",
-    "subsubsection": "subSubSection",
-    "paragraph": "namedParagraph",
-    "subparagraph": "subParagraph",
-    "environment": "environment",
+    "cell": "notebookCell",
 }