Feat/study group register

[nomadbitcoin]

Type of Pull Request:

• [ ] Bug Fix
• [x] New Feature
• [ ] Others

What does this PR do?

We are storing user registrations in study groups in Firestore and mirroring this data to BigQuery through Firebase extensions, and mirroring the student presence from BigQuery to Firestore through Cloud Functions.

Helper Functions:

• Addition of helper functions to facilitate the addition of new courses or groups within the Firebase database.

Implementation Details

All the changes were made by reusing the existing logic and components of the codebase.

Additional Context

• Replicated study_group_presence data from BigQuery prod to the development database.
• Replicated study_groups collection from Firebase prod to development to match IDs with prod.
• Developed a Firebase Function to fetch study group presences, join with user data, and save img_url within an "analytics" field in study_groups metadata. (BigQuery project_id needs to be changed for production)
• Added fields to study_groups copied from prod (slug, image, description, etc.) (Update required at production data)
• Updated the Tabs component to correctly read the analytics field, ensuring consistency with how the field is written by cloud functions.
• Added a "Study Groups" button in the header and changed button background to white for better icon visibility

Closes Issue

Closes #144

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Name	Status	Preview	Comments	Updated (UTC)
web3-bootcamp-platform	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 7, 2024 4:18pm

[danicuki]

great job!