feat: added GBFS metrics to UI

[cka-y]

Summary:

This PR introduces a new UI for GBFS metrics and includes a small fix to the GBFS validation pipeline, along with modifications to the backend for preprocessed GBFS analytics.

Expected Behavior:

• Added views for GBFS feeds, GBFS notices, and GBFS versions.
• Large tables for GBFS and GTFS feeds now use virtualization for improved UX, especially when filtering.
• Added export to CSV functionality for both GTFS and GBFS feed tables.

Testing Instructions:

• Use the provided preview URL.
• Log in with your mobilitydata.org email.
• Verify the new pages and functionalities.

Please make sure these boxes are checked before submitting your pull request - thanks!

• [x] Run the unit tests with ./scripts/api-tests.sh to make sure you didn't break anything
• [ ] Add or update any needed documentation to the repo
• [x] Format the title like "feat: [new feature short description]". Title must follow the Conventional Commit Specification(https://www.conventionalcommits.org/en/v1.0.0/).
• [x] Linked all relevant issues
• [ ] Include screenshot(s) showing how this pull request works and fixes the issue(s)

[github-actions[bot]]

Preview Firebase Hosting URL: https://mobility-feeds-dev--pr-721-g3ub5lrt.web.app