feat: Allow to configure to use syntax and tree-sitter together

lua/nvim-treesitter/configs.lua

@@ -22,7 +22,8 @@ local builtin_modules = {
     enable = false,
     disable = {'markdown'}, -- FIXME(vigoux): markdown highlighting breaks everything for now
     custom_captures = {},
-    is_supported = queries.has_highlights
+    is_supported = queries.has_highlights,
+    additional_vim_regex_highlighting = false,
   },
   incremental_selection = {
     module_path = 'nvim-treesitter.incremental_selection',

lua/nvim-treesitter/highlight.lua

@@ -104,6 +104,9 @@ function M.attach(bufnr, lang)
   end
 
   ts.highlighter.new(parser, {})
+  if config.additional_vim_regex_highlighting then
+    api.nvim_buf_set_option(bufnr, 'syntax', 'ON')
+  end
 end
 
 function M.detach(bufnr)