New Features

   - Added CSV import/export support for password entries.
   - Added an option to require biometric authentication before exporting data.
   - Added a "Clear All Data" feature to delete the database and shared preferences.
   - Added a "Storage Info" section to display the size of the database and preferences.
   - Added an "About" screen with app version and license information.

Improvements

   - Renamed "Passkey" to "Password" for clarity.
   - Settings screen refactored using SettingsViewModel for improved code organization.
   - Biometric authentication now uses StrongBox for enhanced security.
   - Biometric authentication logic in UnlockActivity refactored into BiometricAuthenticator class.
   - Database size utility functions added to calculate and format the database file size.

Bug Fixes

   - Fixed a race condition in the Floating Action Button (FAB) animation.
