added treesitter rainbow

init.vim

@@ -266,6 +266,11 @@ require'nvim-treesitter.configs'.setup {
     fold = {
         enable = true,
     },
+    rainbow = {
+        enable = true,
+        extended_mode = true,
+        max_file_lines = nil,
+    },
 }
 EOF
 set foldmethod=expr