Implement a graphical interface for the FWS system recovery tool using GTK3.
Features:
- Scans for FWS installations on disk
- Provides action buttons for common repairs: GRUB reinstall, initramfs
regeneration, pacman repair, and full system repair
- Displays real-time engine output in a log viewer
- Supports both root session (live mode) and regular user (pkexec elevation)
- Includes terminal access (chroot) for manual diagnostics
- Offers system reboot/poweroff controls
The GUI replaces Arch Linux branding with FWS in output for consistency
while preserving technical identifiers (package names, file paths) for
accurate diagnostics.
