This commit integrates the Firebase SDK into the application to enable Firebase services, starting with Google Analytics.
Key changes include:
- Added the `firebase` package as a dependency.
- Included Firebase project configuration variables in the production environment file.
- Created a new `firebase.ts` utility to centralize Firebase app initialization.
- Integrated the `FirebaseAnalytics` component into the root layout to enable analytics tracking across the entire application.
Modify the .gitignore file to explicitly un-ignore the `.env.production` file.
This allows the production environment configuration to be version-controlled, ensuring it is available for build and deployment processes.