feat(markdown): Improve markdown editing experience

- Enable native code block fontification
- Add htmlize package for HTML export
- Add custom theme faces for markdown-mode headers, code and tables
- Remove Emacs 31+ tree-sitter mode remapping

lisp/init-prog.el

@@ -46,11 +46,11 @@
   :hook
   (markdown-mode . toggle-truncate-lines)
   :init
-  (setq markdown-command "multimarkdown")
-  (when (>= emacs-major-version 31)
-    (add-to-list 'major-mode-remap-alist
-		 '(markdown-mode . markdown-ts-mode))
-    (add-hook 'markdown-ts-mode-hook #'toggle-truncate-lines)))
+  (setq markdown-command "multimarkdown"
+	markdown-fontify-code-blocks-natively t))
+
+;; html
+(use-package htmlize)
 
 (provide 'init-prog)