cleanup: Archive old complex scripts and documentation

- Move all old complex backup scripts to old_scripts/
- Archive previous documentation versions
- Clean up temporary files and debian packages
- Update README to focus on new simple system
- Keep only the enhanced simple backup system in main directory

Main directory now contains only:
- simple_backup_gui.py (GUI interface)
- enhanced_simple_backup.sh (CLI interface)
- list_drives.sh (helper)
- simple_backup.sh (basic CLI)
- SIMPLE_BACKUP_README.md (detailed docs)
- README.md (project overview)

old_scripts/deb-package/usr/share/applications/lvm-backup-manager.desktop

@@ -0,0 +1,11 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=LVM Backup Manager
+Comment=Professional LVM volume backup with GUI
+Exec=pkexec lvm-backup-manager
+Icon=lvm-backup-manager
+Categories=System;Administration;
+Keywords=backup;lvm;snapshot;clone;system;recovery;
+StartupNotify=true
+StartupWMClass=LVM Backup Manager