Migrate from Projectile to built-in project.el and fix Org mode

Major changes:
- Replace Projectile with built-in project.el for project management
- Add comprehensive Org mode configuration with TODO keywords and org-kanban support
- Fix multiple parsing errors and keybinding conflicts

Key improvements:
- Faster startup with built-in project.el (no external dependencies)
- Better integration with Eglot LSP client
- Proper Org TODO keyword highlighting and kanban column ordering
- Fixed unbalanced parentheses in init-completion.el and init-utils.el
- Resolved keybinding conflicts (C-c d g → C-c G d, removed C-u C-c C-r)
- Updated all file paths in init-utils.el to use lisp/ subdirectory

The configuration now loads cleanly without errors and maintains backward
compatibility with most Projectile keybindings (C-c p prefix) while also
supporting the standard project.el bindings (C-x p prefix).

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

lisp/init-treemacs.el

@@ -18,7 +18,7 @@
          ("C-c T s"   . treemacs-search-file)
          :map treemacs-mode-map
          ("/" . treemacs-search-file)
-         ("C-s" . projectile-find-file)
+         ("C-s" . project-find-file)
          ("s" . consult-ripgrep))
   :config
   (setq treemacs-collapse-dirs                   (if treemacs-python-executable 3 0)
@@ -71,10 +71,8 @@
 
   (treemacs-hide-gitignored-files-mode nil))
 
-(use-package treemacs-projectile
-  :ensure t
-  :after (treemacs projectile)
-  :defer t)
+;; treemacs-projectile is no longer needed with project.el
+;; Treemacs has built-in support for project.el
 
 (use-package treemacs-all-the-icons
   :ensure t
@@ -96,8 +94,8 @@
 (defun treemacs-search-file ()
   "Search for a file in the current project using consult."
   (interactive)
-  (if (fboundp 'projectile-find-file)
-      (projectile-find-file)
+  (if (fboundp 'project-find-file)
+      (project-find-file)
     (consult-find)))
 
 (defun treemacs-open-marked-files ()