enable folding

init.lua

@@ -198,6 +198,13 @@ vim.o.scrolloff = 10
 -- See `:help 'confirm'`
 vim.o.confirm = true
 
+-- Set folding to use Treesitter
+vim.o.foldmethod = 'expr'
+vim.o.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
+
+-- Prevent everything from being folded when you open a file
+vim.o.foldlevelstart = 99
+
 -- [[ Basic Keymaps ]]
 --  See `:help vim.keymap.set()`