Test and Document Firebase Library

[robert-s-hogan]

Tasks:

• Write unit tests for authentication and Firestore services using Jest
• Set up integration tests with the Firebase emulator (if applicable)
• Document how to use the library components within the NX monorepo, including setup and example usage

[robert-s-hogan]

Install and set up Firebase Emulator Suite following the Firebase documentation.
Configure your tests to use the Firestore and Auth emulators. You can do this by modifying your Firebase config in tests to connect to the emulator's address (usually localhost with specific ports).
Write integration tests that interact with the emulated Firestore and Auth services, similar to unit tests but without mocking Firestore and Auth methods.