Add Rails 7.1 support

[tomascco]

I made this PR similar to #707, trying to keep the same structure:

• Updated the "main" Gemfile to Rails 7.1
• Moved the old Gemfile to the gemfiles folder
• Updated all Gemfiles

rake test passed on my machine with the same output (I think) before this PR

You may also feel free to modify, give feedbacks, etc.

Hope this helps 😄

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (3e7a7e5) 98.19% compared to head (036a03e) 98.19%.
Report is 16 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #873   +/-   ##
=======================================
  Coverage   98.19%   98.19%           
=======================================
  Files          14       14           
  Lines         555      555           
=======================================
  Hits          545      545           
  Misses         10       10           

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[javierjulio]

Thanks! I'll do a separate update to remove the upper bound so we can avoid having to release, assuming no other changes are needed for support. That will close out #711.

[javierjulio]

@tomascco there are several deprecation warnings as a result of updating to Rails 7.1. It would help to have a follow up to resolve those if you or someone else is able too. Thank you.

[tomascco]

Sure, I'll try my best to tackle those warnings 😃

[javierjulio]

Thank you, I appreciate it! If you have trouble feel free to post what you have in a PR and others can jump in.