update fold method plus fix golangci lint causing error

also add keybinds to codecompanion

lua/options.lua

@@ -65,3 +65,7 @@ vim.o.termguicolors = true
 -- enable spell checking
 vim.o.spell = true
 vim.o.spelllang = 'en_gb'
+
+vim.o.foldmethod = 'expr'
+vim.o.foldexpr = 'nvim_treesitter#foldexpr()'
+vim.o.foldenable = false