feat: Add Floating Toolbar examples

This commit introduces examples for the Material 3 Floating Toolbar component.

Key changes:
- Added `FloatingToolBarVariant1.kt` and `FloatingToolBarVariant2.kt` to showcase different Floating Toolbar implementations.
- Created `FloatingToolBarListingScreen.kt` to display the available Floating Toolbar examples.
- Integrated Floating Toolbar navigation into `AppNavigation.kt` and `AppRoutes.kt`.
- Added a "Floating ToolBar Example" entry to the `HomeScreen.kt`.