feat: Add progress indicator components and navigation

This commit introduces new composable functions and navigation graphs for various progress indicator components.

Key changes:
- Added `ProgressIndicatorComposables.kt` with examples of `CircularWavyProgressIndicator` and `ContainedLoadingIndicator`.
- Added `RefreshIndicatorComposable.kt` demonstrating the `PullToRefresh` functionality.
- Added `ProgressIndicatorScreen.kt` to list the available progress indicator examples.
- Added `ProgressIndicatorNavGraph.kt` to define navigation for the progress indicator feature.
- Added `GroupButtonNavGraph.kt` to define navigation for button group examples.