Use built-in treesitter on Emacs 29+

[flexagoon]

I confirm that...

• I have searched the issue tracker, documentation, FAQ, Discourse, and Google, in case this issue has already been reported/resolved.
• I have read "How to Debug Issues", and will use it to provide as much information about this issue as possible.
• The issue can be reproduced on the latest available commit of Doom.
• The issue can be reproduced on a stable release of Emacs, such as 27, 28, or 29. (Unstable versions end in .50, .60, or .9x)

Expected behavior

The :tools tree-sitter module should use the built-in treesit functionality of Emacs when using Emacs 29+

Current behavior

The module always uses the third-party tree-sitter package

Steps to reproduce

1. Enable the :tools tree-sitter module, and enable +tree-sitter for some language
2. Check what modes are enabled
3. With proper behaviour, <lang>-ts-mode should be enabled, but currently <lang>-mode and tree-sitter-mode are used.

System Information

https://pastebin.com/8zu4gf4Y

[rcoacci]

@flexagoon did you find any way to use the built-in tree-sitter with doom? Can you share your solution?

[flexagoon]

@rcoacci I asked on the Doom Emacs Discord and someone said that there's no way to use it while keeping all of the Doom configuration, the only way is to set up the mode remap alist to use the treesitter mode instead of the normal one and then configure everything yourself

[davidhaley]

I ran into errors trying to use <lang>-ts-mode as well.

If I disable :tools tree-sitter then tree-sitter is unavailable. Maybe I have to compile Emacs again separately. (edit: after removing :tools tree-sitter, doom sync, and doom build, the native tree-sitter is available).

It would be nice to use tree-sitter natively, with the new modes.

[hlissner]

I'll be looking into switching to treesit.el sometime this month (likely to coincide with Doom dropping Emacs 27 support). I'll post here when I start on it/once it's done.