Update navigation labels to "Home" and integrate BookmarkListScreen into HomeScreen
- Rename "Apps" navigation label to "Home" across `App.kt`, `AppLauncherViewModel`, and `BookmarkListViewModel`. - Update `HomeScreen` to include a new "Bookmarks" tab alongside the existing "Apps" tab. - Refactor `BookmarkListScreen` UI: remove redundant styling boxes/borders around icons and adjust icon sizing. - Update `strings.xml` to include new "home" and "bookmarks" resources and update the bookmark empty state message. - Update Maestro flow test to reflect UI text changes.