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/DEBIAN/postinst

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Post-installation script for LVM Backup Manager
+
+set -e
+
+# Set proper permissions
+chmod +x /usr/bin/lvm-backup-manager
+chmod +x /usr/bin/lvm-block-backup
+
+# Create symlink for easy access
+if [ ! -L /usr/local/bin/lvm-backup-gui ]; then
+    ln -s /usr/bin/lvm-backup-manager /usr/local/bin/lvm-backup-gui
+fi
+
+echo "LVM Backup Manager installed successfully!"
+echo "You can now launch it from:"
+echo "  - Applications menu: System Tools → LVM Backup Manager"
+echo "  - Terminal: sudo lvm-backup-manager"
+echo "  - Desktop: Double-click the LVM Backup Manager icon"
+
+exit 0