Add initial agents.md

[bwoebi]

And cleanup CONTRIBUTING.md.

Feedback welcome.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.78%. Comparing base (fd1ba67) to head (38b5214).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3755      +/-   ##
==========================================
- Coverage   68.85%   68.78%   -0.08%     
==========================================
  Files         166      166              
  Lines       19015    19015              
  Branches     1792     1792              
==========================================
- Hits        13093    13079      -14     
- Misses       5111     5124      +13     
- Partials      811      812       +1     

Flag	Coverage Δ
helper-rust-integration	78.82% <ø> (ø)
helper-rust-unit	49.36% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.
see 3 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fd1ba67...38b5214. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[datadog-official]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 60.64% (-0.04%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 38b5214 | Docs | Datadog PR Page | Was this helpful? React with 👍/👎 or give us feedback!}