Add FWS default i3 configuration file with X11 session support.
Includes:
- Color scheme based on Catppuccin Mocha palette
- Keyboard bindings for common applications and window management
- VR headset driver setup integration (Super+Shift+V)
- Multi-monitor and workspace navigation support
- Screenshot and multimedia control bindings
- Status bar configuration with i3status
- Autostart for dunst, nm-applet, polkit-gnome, and blueman
