code block folding

common/nvim/init.lua

@@ -150,6 +150,9 @@ vim.opt.cursorline = true
 -- Minimal number of screen lines to keep above and below the cursor.
 vim.opt.scrolloff = 10
 
+vim.opt.foldmethod = "expr"
+vim.opt.foldexpr = "nvim_treesitter#foldexpr()"
+
 -- [[ Basic Keymaps ]]
 --  See `:help vim.keymap.set()`