6.1 Player Data Storage

## Description

As a developer, I need to store player and pod data so that the app can manage the game state.

### Acceptance Criteria

- Implement a lightweight backend for data persistence (e.g., Firebase or a serverless database).
- Ensure data is accessible in real-time for the frontend.

### Tasks

- [ ] Set up a database for players and pods.
- [ ] Create APIs for data access and updates.
