Refactors the HomeScreen to dynamically display content based on the user's authentication status.
- Migrated HomeScreen from StatefulWidget to StatelessWidget.
- Introduced Consumer<AuthState> to listen for authentication changes.
- Implemented placeholder _LoggedInView and _LoggedOutView widgets for conditional rendering.
- Restored irebase_core and irebase_auth dependencies to pubspec.yaml and main.dart which were inadvertently removed by dart_fix.
- Removed outdated state management for bottom navigation bar.
- Addressed dart fix warnings and ensured code formatting.
