* WIP: Rework indentation system
* Add ComplexNode for context-aware indentation (including a proof of concept for assignment statements in rust)
* Add switch statements to Go indents.toml (fixes the second half of issue #1523)
Remove commented-out code
* Migrate all existing indentation queries.
Add more options to ComplexNode and use them to improve C/C++ indentation.
* Add comments & replace Option<Vec<_>> with Vec<_>
* Add more detailed documentation for tree-sitter indentation
* Improve code style in indent.rs
* Use tree-sitter queries for indentation instead of TOML config.
Migrate existing indent queries.
* Add documentation for the new indent queries.
Change xtask docgen to look for indents.scm instead of indents.toml
* Improve code style in indent.rs.
Fix an issue with the rust indent query.
* Move indentation test sources to separate files.
Add `#not-kind-eq?`, `#same-line?` and `#not-same-line` custom predicates.
Improve the rust and c indent queries.
* Fix indent test.
Improve rust indent queries.
* Move indentation tests to integration test folder.
* Improve code style in indent.rs.
Reuse tree-sitter cursors for indentation queries.
* Migrate HCL indent query
* Replace custom loading in indent tests with a designated languages.toml
* Update indent query file name for --health command.
* Fix single-space formatting in indent queries.
* Add explanation for unwrapping.
Co-authored-by: Triton171 <triton0171@gmail.com>
