Added visible modifier (#2094)

Fixes #1607

Tested with `"from visible chuck every instance air"` and folded regions
will be untouched.




## 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

Author: AndreasArvidsson

src/spoken_forms.json

@@ -76,7 +76,8 @@
       "trailing": "trailing",
       "content": "keepContentFilter",
       "empty": "keepEmptyFilter",
-      "its": "inferPreviousMark"
+      "its": "inferPreviousMark",
+      "visible": "visible"
     },
     "simple_scope_modifier": { "every": "every" },
     "interior_modifier": {