Proper handling of surrounding pair delimiter prefixes (#2705)

On main `"take inside"` on `"command server"` will only select `command
serve` because `r"` is considered a delimiter. This pull request fixes
this.

## 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 <[email protected]>
Co-authored-by: Phil Cohen <[email protected]>

Author: 3 people

src/spoken_forms.py

@@ -160,6 +160,7 @@ def handle_new_values(csv_name: str, values: list[SpokenFormEntry]):
                 "private.switchStatementSubject",
                 "textFragment",
                 "disqualifyDelimiter",
+                "pairDelimiter",
             ],
             default_list_name="scope_type",
         ),