feat(tree-sitter): conditionally enable ts-hl-mode

Based on the new variable `+tree-sitter-hl-enabled-modes`

This allows for people to use tree sitters tools without having
to use it for highlighting.
Useful because some modes (such as web-mode and its derivatives) do a
better job than the tree sitter alternative in this respect.

modules/tools/tree-sitter/config.el

@@ -1,7 +1,17 @@
 ;;; tools/tree-sitter/config.el -*- lexical-binding: t; -*-
 
+(defvar +tree-sitter-hl-enabled-modes '(not web-mode typescript-tsx-mode)
+  "A list of major modes which should be highlighted by tree-sitter.
+
+If this list begins with `not', then it negates the list.
+If it is t, it is enabled in all modes.
+If nil, it is disabled in all modes")
+
+;;
+;;; Packages
+
 (use-package! tree-sitter
-  :hook (tree-sitter-after-on . tree-sitter-hl-mode)
+  :defer t
   :config
   (require 'tree-sitter-langs)
   ;; This makes every node a link to a section of code