refactor: enhance storage screen functionality and UI updates

- Updated the storage screen to automatically load reclaimable buckets and largest files upon engine connection.
- Improved scan handling with a new listener for engine connection status.
- Enhanced user feedback during scanning and added refresh functionality.
- Updated UI messages to provide clearer instructions and status updates for users.
- Implemented sorting for categories based on predefined ranks for better organization.

Author: AsieduDevelopmentHub