Added Firebase Realtime Database storage functionality in tracker store

[Thirunayan22]

Proposed changes:

• Added Firebase storage functionality addressed in issue #8642 to tracker_stores.py
• Created FirebaseRealtimeTrackerStore class to to track and store conversation history in a firebase real-time database instance
• Updated _create_from_endpoint_config method to connect a Firebase Realtime Database instance through endpoints.yml
• Updated dependencies to include Firebase Admin SDK

Status (please check what you already did):

• [ ] added some tests for the functionality
• [ ] updated the documentation
• [ ] updated the changelog (please check changelog for instructions)
• [x] reformat files using black (please check Readme for instructions)

[CLAassistant]

All committers have signed the CLA.

[sara-tagger]

Thanks for submitting a pull request 🚀 @amn41 will take a look at it as soon as possible ✨

[stale[bot]]

This PR has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Thirunayan22]

Hi @ancalita , no worries, and thanks a lot for reviewing the PR 💯 , I was also waiting for the feedback on this. As you noted, I will make the changes and get back to you. Thank you