Duplication between helix-core/src/match_brackets.rs and helix-core/src/surround.rs

[A-Walrus]

Looking at #3357 I noticed that both match_brackets.rs and surround.rs have code that is solving what appears to be essentially the same problem, finding matching brackets. The key difference between them is that match_brackets.rs is based on tree-sitter while surround.rs is not. This means that:

• Goto matching bracket doesn't work on regular text files
• Inconsistent behavior between Match (m) sub commands
• It is unclear why bracket matching is based on tree sitter while everything else isn't
• Also duplication of logic is obviously not great.

Notice also that they both have very similar `PAIRS` arrays

// match_brackets.rs
const PAIRS: &[(char, char)] = &[
    ('(', ')'),
    ('{', '}'),
    ('[', ']'),
    ('<', '>'),
    ('\'', '\''),
    ('\"', '\"'),
];

// surround.rs
pub const PAIRS: &[(char, char)] = &[
    ('(', ')'),
    ('[', ']'),
    ('{', '}'),
    ('<', '>'),
    ('«', '»'),
    ('「', '」'),
    ('（', '）'),
];

I propose unifying the logic into one file, and making all bracket matching / surrounding commands work the same.
Thoughts?

[dead10ck]

There's also https://github.com/helix-editor/helix/blob/master/helix-core/src/auto_pairs.rs ! I haven't fully thought through all the consequences, and if it would be desirable, but I had also thought before that since the auto pairs are now fully user configurable, the matching and surround logic could use the same pairs.

[jw013]

#8294 seems very related so mentioning it for the link