Added break line action (#2103)

`"break air"`

## Checklist

- [x] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [x] 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)
- [x] I have not broken the cheatsheet

---------

Co-authored-by: Pokey Rule <[email protected]>

Author: 2 people

src/spoken_forms.json

@@ -3,6 +3,7 @@
   "actions.csv": {
     "simple_action": {
       "bottom": "scrollToBottom",
+      "break": "breakLine",
       "break point": "toggleLineBreakpoint",
       "carve": "cutToClipboard",
       "center": "scrollToCenter",