refactor!(tree-sitter): add +tree-sitter flag

BREAKING CHANGE: break the global nature of the tree sitter
module by adding a +tree-sitter flag to every applicable module

In the background this hooks turn-on-tree-sitter-mode
to the major-mode-hook of the language.
This may also solve the eager loading of tree sitter

modules/lang/web/config.el

@@ -55,3 +55,9 @@
   (def-project-mode! +web-phaser-mode
     :modes '(+javascript-npm-mode)
     :when (+javascript-npm-dep-p '(or phaser phaser-ce))))
+
+;; Tree sitter
+(eval-when! (featurep! +tree-sitter)
+  (add-hook! '(html-mode-hook
+               mhtml-mode-hook
+               css-mode-hook)) #'turn-on-tree-sitter-mode)