nvim-treesitter re-write changes remove ts_utils

[taylrfnt]

this PR addresses some of the more modern nvim-treesitter rewrites, which break a lot of the common ts_utils and other utility calls.

the changes in the commit below remove the call to ts_utils and instead offset the coords from 0-indexed treesitter cords to 1-index vim coords.

I was able to test this successfully locally against treesitter's main branch and nvim v0.11.5.

This addresses #84

Hoping this helps anyone else who runs into a similar issue running the unstable treesitter rewrite :)

[machshev]

Looks good

[rhamilt]

When I checkout your fork with these changes, I get an indexing error:

E5108: Error executing lua: ...e/nvim/lazy/codewindow.nvim/lua/codewindow/highlight.lua:110: attempt to index a nil value
stack traceback:
	...e/nvim/lazy/codewindow.nvim/lua/codewindow/highlight.lua:110: in function 'fn'
	...2/share/nvim/runtime/lua/vim/treesitter/languagetree.lua:650: in function 'for_each_tree'
	...e/nvim/lazy/codewindow.nvim/lua/codewindow/highlight.lua:81: in function 'extract_highlighting'
	.../share/nvim/lazy/codewindow.nvim/lua/codewindow/text.lua:101: in function 'update_minimap'
	...local/share/nvim/lazy/codewindow.nvim/lua/codewindow.lua:25: in function 'open_minimap'
	...local/share/nvim/lazy/codewindow.nvim/lua/codewindow.lua:44: in function <...local/share/nvim/lazy/codewindow.nvim/lua/codewindow.lua:40>

This error occurs when toggling the codewindow on.

[taylrfnt]

Hm, interesting. Can you share your neovim version, Treesitter version, and maybe the file that's the active buffer when you're attempting to toggle code window on?

I'd like to try and find a fix for this case if possible, but I've been unsuccessful in reproducing so far.