feat(ruby): Rails integration gem

[Stranger6667]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

✅ 12 untouched benchmarks

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_{Comparing worktree-css-inline-rails (136a4d9) with master (dcedc1b)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.04%. Comparing base (70b5ee1) to head (136a4d9).
⚠️ Report is 1 commits behind head on master.

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           

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