Add ability to match in next and previous char pairs (2)

[thomasschafer]

Adds the ability to match inside/around the next or previous matching character pair: for instance, with the cursor as █ below:

█ let x = "bar";

typing ]" would select the contents of the string (i.e. bar).

Screen.Recording.2024-09-15.at.10.20.34.mov

Supersedes #11260 based on discussion there.

Partially resolves:

• Automatically jump to matching brackets #1974
• "Match next pair" with `[`/`]` followed by `m` (or: a better `vi"` from VIM) #9895
• Modify matching behavior when it fails to find the matching character #10567

[thomasschafer]

Note: the first commit is essentially just the changes linked in the comment here. I left the two TODO comments in as I couldn't see a nice way to tidy things up without adding unnecessary complexity, but happy to hear any pointers.