Implement Bookmark Feature

[ShubhKanodia]

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issue: Implement Bookmark Feature
description:
The PES Buzz app aims to provide users with the ability to bookmark their favorite news items. To achieve this, we need to implement a bookmark feature that stores user-specific bookmarks and allows users to easily access their saved news items.

Tasks:

• Create a "bookmarks" collection in Firebase Firestore to store user-specific bookmarks.
• Implement a "Bookmark" button on news item details pages.
• Allow users to add or remove news items from their bookmarks.
• Create a screen where users can view their bookmarked news items.
• Implement shared preferences for offline access to bookmarks.
• Ensure that bookmarks are synchronized with the cloud.

Acceptance Criteria:

• The app features a bookmark button on news item details pages.
• Users can add or remove news items from their bookmarks.
• A "Bookmarks" screen is available for users to view their saved news items.
• Bookmarks are stored in Firebase Firestore for cloud synchronization.
• Bookmarks can be accessed offline using shared preferences.
• The bookmark feature is fully functional and tested.

Definition of Done:

• Users can successfully bookmark and unbookmark news items.
• The "Bookmarks" screen displays saved news items.
• Bookmarks are stored in Firebase Firestore and accessible offline.
• The feature is fully tested and meets user expectations.
• The issue is reviewed and accepted for implementation.

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