Nvim Treesitter support

Not sure if I should post it here, but the tree-sitter build-in neovim doesn't support rescript. It's a great improvement for color highlight and other plugins features ( I think about blankline or telescope preview for example).
With the recent release of nvim 0.5, it's now a must have.

If we look at the elm way, they have a dedicated repo: https://github.com/elm-tooling/tree-sitter-elm for the "regular" tree-sitter as a common based, then we can have the slightly different version targeting nvim as explain here: https://github.com/nvim-treesitter/nvim-treesitter/issues/529

Posting it here, as vs code took the opposite way to deprecied tree-sitter so it primaly focus neovim. Also, the current highlight syntax have some issue, it can fixed it at least for neovim, in what it seems to be an easier way than through LSP.

I will probably not have time to take care of it, but I post it here for the record anymway.

Commencez par examiner la syntaxe de coloration actuelle dans le dépôt vim-rescript ainsi que les approches référencées de Elm tree-sitter et nvim-treesitter. Le travail sera considéré comme terminé lorsque vous aurez documenté ou implémenté une voie viable pour la prise en charge de Tree-sitter dans Neovim et traité les limitations de coloration signalées, avec un résultat vérifié par rapport aux fonctionnalités Neovim demandées.