ci: aligned CI and documentation with go-openapi repos

[fredbi]

This PR introduces shared CI workflows.

README layout and other available documentation have been aligned.

Change type

Please select: 🆕 New feature or enhancement|🔧 Bug fix'|📃 Documentation update

Short description

Fixes

Full description

Checklist

• I have signed all my commits with my name and email (see DCO. This does not require a PGP-signed commit
• I have rebased and squashed my work, so only one commit remains
• I have added tests to cover my changes.
• I have properly enriched go doc comments in code.
• I have properly documented any breaking change.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.08%. Comparing base (589beea) to head (e152e2a).
⚠️ Report is 13 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #142   +/-   ##
=======================================
  Coverage   92.08%   92.08%           
=======================================
  Files          17       17           
  Lines        2021     2021           
=======================================
  Hits         1861     1861           
  Misses        107      107           
  Partials       53       53           

Flag	Coverage Δ
oldstable-macos-latest	?
oldstable-ubuntu-latest	?
oldstable-windows-latest	?
stable-macos-latest	?
stable-ubuntu-latest	?
stable-windows-latest	?

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