feat: add dashboard and enhance completion

- Add startup dashboard with recent files and bookmarks
- Enhance corfu with icons and minibuffer transfer
- Add avy-zap, markdown-mode, consult-dir
- Optimize GC settings and editor config

init.el

@@ -22,6 +22,7 @@
 (require 'init-window)
 (require 'init-kbd)
 (require 'init-ui)
+(require 'init-dashboard)
 (require 'init-segmentation)
 
 ;;; init.el ends here