feat: Implement slide transitions for navigation

This commit introduces horizontal slide transitions for navigation within the app.

- Screens will now slide in from the right and slide out to the left when navigating forward.
- When navigating back, screens will slide in from the left and slide out to the right.
- This applies to both regular back navigation and predictive back gestures.

The changes are implemented in `AppNavigation.kt` by setting the `transitionSpec`, `popTransitionSpec`, and `predictivePopTransitionSpec` properties of the `NavDisplay` composable.