Standardize formatting across multiple init files: expand
single-line use-package keywords onto separate lines, fix
indentation, remove outdated comments, and clean up whitespace. Also
adds mc/keymap <return> binding and improves fcitx5 startup logic in
EXWM.
- Add platform-specific keybindings, paths, and settings for macOS
- Update org-mode templates and agenda files for both Windows and Mac
- Add vterm and lua-ts-mode packages (non-Windows)
- Configure Chinese segmentation for macOS
- Adjust font sizes and encoding settings per platform