config: use nvim-treesitter for folding

config/basic.lua

@@ -17,7 +17,6 @@ vim.opt.encoding = "utf-8"
 vim.opt.termguicolors = true
 
 -- Other options
-vim.cmd("syntax on")
 vim.opt.backspace = { "indent", "eol", "start" }
 vim.opt.laststatus = 2
 vim.opt.showmode = false
@@ -88,6 +87,10 @@ vim.opt.foldlevel = 99
 vim.opt.foldlevelstart = 99
 vim.opt.foldminlines = 3
 vim.opt.foldnestmax = 5
+vim.opt.foldmethod = "expr"
+vim.cmd([[
+  set foldexpr=nvim_treesitter#foldexpr()
+]])
 
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 --
@@ -126,32 +129,6 @@ set_line_limiter(81, {
 	"*.css",
 })
 
--- Spell check for markdown files
-local spell_check_augroup = vim.api.nvim_create_augroup("spell_check", {})
-vim.api.nvim_create_autocmd(bufReadFile, {
-	pattern = { "*.md" },
-	group = spell_check_augroup,
-	callback = function()
-		vim.wo.spell = true
-	end,
-})
-
--- Set up fold method for each lang
-local folding_augroup = vim.api.nvim_create_augroup("folding", {})
-vim.api.nvim_create_autocmd(bufReadFile, {
-	group = folding_augroup,
-	pattern = {
-		"*.js",
-		"*.jsx",
-		"*.ts",
-		"*.tsx",
-	},
-	callback = function()
-		vim.cmd("syntax on")
-		vim.wo.foldmethod = "syntax"
-	end,
-})
-
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 --
 -- Bindings