feat: Add Bottom App Bar component and examples

This commit introduces the Bottom App Bar component with four variants and integrates it into the app's navigation and home screen.

Key changes:
- Added `BottomAppBarVariant1.kt`, `BottomAppBarVariant2.kt`, `BottomAppBarVariant3.kt`, and `BottomAppBarVariant4.kt` Composable files for different Bottom App Bar styles.
- Created `BottomAppBarListingScreen.kt` to display the list of Bottom App Bar variants.
- Added `BottomAppBarNavGraph.kt` to define the navigation graph for Bottom App Bar examples.
- Updated `AppNavigation.kt` to include the Bottom App Bar navigation graph.
- Modified `HomeScreen.kt` to add a navigation entry for the Bottom App Bar examples.
- Updated route definitions in `AppRoutes.kt` to include `BottomApBarRoutes` and renamed existing `*ListingRoute` objects to `ListingRoute` for consistency.
- Refactored `ProgressIndicatorNavGraph.kt` and `GroupButtonNavGraph.kt` to use the updated `ListingRoute` name.