Config: extract keybinding functions and clean up key configs

- Add init-kbd-func.el for keybinding helper functions
- Move global-display-line-numbers-mode from early-init.el to init.el
- Slim down init-kbd.el: remove hydra-multiple-cursors, migrate defs
- Reorganize dirvish config
- Remove scattered global-set-key bindings from init-org, init-ui, etc.
- Guard server-start with server-running-p check
- Set ibuffer-default-sorting-mode to filename
- Tweak gptel config

lisp/init-package.el

@@ -227,22 +227,7 @@ targets."
 		            (lambda ()
 		              (ibuffer-projectile-set-filter-groups)
 		              (unless (eq ibuffer-sorting-mode 'alphabetic)
-		                (ibuffer-do-sort-by-alphabetic))))
-  (when (centaur-treesit-available-p)
-    (defun treesit-mark-bigger-node ()
-      "Use tree-sitter to mark regions."
-      (let* ((root (treesit-buffer-root-node))
-             (node (treesit-node-descendant-for-range root (region-beginning) (region-end)))
-             (node-start (treesit-node-start node))
-             (node-end (treesit-node-end node)))
-        ;; Node fits the region exactly. Try its parent node instead.
-        (when (and (= (region-beginning) node-start) (= (region-end) node-end))
-          (when-let* ((node (treesit-node-parent node)))
-            (setq node-start (treesit-node-start node)
-                  node-end (treesit-node-end node))))
-        (set-mark node-end)
-        (goto-char node-start)))
-    (add-to-list 'er/try-expand-list 'treesit-mark-bigger-node)))
+		                (ibuffer-do-sort-by-alphabetic)))))
 
 ;; avy中文支持
 (use-package ace-pinyin