feat(repo): create AGENTS.md file for the feeds repo

[renefloor]

Submit a pull request

Part of FLU-267

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

This creates a basic Agents.md file for the feeds project

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 20.88%. Comparing base (d08e4e9) to head (70f692d).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #54   +/-   ##
=======================================
  Coverage   20.88%   20.88%           
=======================================
  Files         120      120           
  Lines        3289     3289           
=======================================
  Hits          687      687           
  Misses       2602     2602           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.