Added scope type for "inside" (#2776)

Inside/interior today is a modifier and will stay so in the future, but
we are also introducing interior as a scope type. This will allow us to
do `"take inside"` when on a if statement, python function and so on.

It now takes the closest of the nearest tree-sitter interior _or_
surrounding pair. This is most useful for Python; in other languages
with {} statement-blocks, the braces would already be easy to target,
but now "take inside" behaves intuitively there as well.

The scm syntax `@scope.interior` have been replaced by `@interior` as
its own scope type.

Fixes #1046

## 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

## Release notes

You can now use "inside" to refer to the inside body of a language scope
(function, if statement, etc). This is especially useful for Python,
because previously you had to think about what scope you were targeting
-- "take inside" now just works.

It also works nicely for targeting the inside of C-style statements that
don't have `{}` braces, like single line conditionals or loops.

In Python, this also means that you can now target the inside of the
function ("take inside") even while the cursor is in a related location
(such as in its name). Note that this behavior currently only exists for
Python; we plan to port it to other languages as well since it is
useful.

---------

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

Author: AndreasArvidsson

src/spoken_forms.py

@@ -161,6 +161,7 @@ def handle_new_values(csv_name: str, values: list[SpokenFormEntry]):
                 "textFragment",
                 "disqualifyDelimiter",
                 "pairDelimiter",
+                "interior",
             ],
             default_list_name="scope_type",
         ),