feat(ruby): Rails integration gem

[Stranger6667]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 12 untouched benchmarks

---

_{Comparing worktree-css-inline-rails (9dae39b) with master (dcedc1b)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.04%. Comparing base (dcedc1b) to head (9dae39b).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #780   +/-   ##
=======================================
  Coverage   92.04%   92.04%           
=======================================
  Files          17       17           
  Lines        2603     2603           
=======================================
  Hits         2396     2396           
  Misses        207      207           

☔ View full report in Codecov by Harness.
📢 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.