Add AppImageUpdate support

Update Rust GUI to always use local binary execution via bin-local/

bump windusb-gui to version 1.0.1

Refactor: implement multi-phase progress tracking for flashing

- Introduce a phase-based monitoring system to distinguish between
  boot file extraction and WIM splitting.
- Improve progress accuracy by calculating WIM split delta against
  a baseline disk usage.
- Add proactive device existence checks within the monitoring thread
  to handle accidental unplugging gracefully.
- Refine final sync progress calculation and status messaging.
- Clean up unused imports and simplify command status handling.

Optimize build script logic and improve flasher progress accuracy

Fix: detect drive disconnection and handle process errors during flas…

…hing

Optimize build script logic and improve flasher progress accuracy

Refactor: major overhaul of build script for maximum portability

Improve extraction reliability and progress accuracy

- Switch extraction method from rsync to 7z for better performance
- Implement real-time write speed tracking (MB/s)
- Use /proc/meminfo to account for system dirty bytes for accurate progress
- Improve process management by using PGID for cleaner shutdowns
- Enhance UI with custom CSS, better spacing, and dynamic syncing labels

Improve extraction reliability and progress accuracy

- Switch extraction method from rsync to 7z for better performance
- Implement real-time write speed tracking (MB/s)
- Use /proc/meminfo to account for system dirty bytes for accurate progress
- Improve process management by using PGID for cleaner shutdowns
- Enhance UI with custom CSS, better spacing, and dynamic syncing labels

 Implement real-time progress monitoring via byte-calculation thread

- Integrate 7zzs (static 7z) for robust ISO validation in AppImage environments
- Fix dconf and D-Bus portal warnings by forcing memory backend and local VFS
- Centralize process cleanup to handle SIGINT and window closure gracefully
- Optimize UI with native Adwaita decorations and percentage feedback"