We aim at feature freeze for Nvim 0.9 at the end of March. We hope it will be worth the wait!

A lot of tree-sitter improvements getting in, largely thanks to core dev @lewis6991:

- Parsing of nested languages is now fully incremental
- Change format of injection queries to enable collab with projects like tree-sitter-highlight and helix
- support for folding via 'foldexpr' (ported from nvim-treesitter)
- Expose more of the upstream TS node API to lua plugins
- a lot of smaller robustness fixes