Add home News feed selector

[malkoG]

Summary

• Add a Home app bar selector for Timeline and News without adding a new bottom navigation item.
• Wire News to the new newsStories GraphQL API with a paged Popular/Newest/All-time card feed.
• Keep the selected Home sub-surface in navigation state and add focused selector tests.

Validation

• ./gradlew :app:compileDebugKotlin
• ./gradlew :app:testDebugUnitTest --tests pub.hackers.android.ui.HomeFeedTest --tests pub.hackers.android.ui.components.HomeFeedSelectorTest
• ./gradlew :app:lintDebug

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 84095f5d-0df8-45e2-8188-92acdfd1eab5

📥 Commits

Reviewing files that changed from the base of the PR and between f344ee2 and d1df32d.

📒 Files selected for processing (15)

• app/src/main/graphql/pub/hackers/android/operations.graphql
• app/src/main/graphql/pub/hackers/android/schema.graphqls
• app/src/main/java/pub/hackers/android/data/paging/CursorPagingSource.kt
• app/src/main/java/pub/hackers/android/data/repository/HackersPubRepository.kt
• app/src/main/java/pub/hackers/android/domain/model/Models.kt
• app/src/main/java/pub/hackers/android/ui/HackersPubApp.kt
• app/src/main/java/pub/hackers/android/ui/HomeFeed.kt
• app/src/main/java/pub/hackers/android/ui/components/HomeFeedSelector.kt
• app/src/main/java/pub/hackers/android/ui/components/LargeTitleHeader.kt
• app/src/main/java/pub/hackers/android/ui/screens/news/NewsScreen.kt
• app/src/main/java/pub/hackers/android/ui/screens/news/NewsViewModel.kt
• app/src/main/java/pub/hackers/android/ui/screens/timeline/TimelineScreen.kt
• app/src/main/res/values/strings.xml
• app/src/test/java/pub/hackers/android/ui/HomeFeedTest.kt
• app/src/test/java/pub/hackers/android/ui/components/HomeFeedSelectorTest.kt

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