Improve ErrSkip handling, add test for Summary and operations order

[vearutop]

🤔 What's changed?

This PR

• Updates some of the error checks with errors.Is for better reliability with wrapping
• Adds missing handling of step result statuses for ErrSkip
• Adds a test to validate formatter Summary() and step execution flow

⚡️ What's your motivation?

#582 introduced a fix that was invisible for current test suite (tests passing before and after), while covering the fix with a regression test it turned out, ErrSkip is not properly reported in Summary().

🏷️ What kind of change is this?

• 🐛 Bug fix (non-breaking change which fixes a defect)

♻️ Anything particular you want feedback on?

📋 Checklist:

• I agree to respect and uphold the Cucumber Community Code of Conduct
• I've changed the behaviour of the code
  • I have added/updated tests to cover my changes.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• Users should know about my change
  • I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[github-actions]

Go API Changes

# summary
Inferred base version: v0.13.0
Suggested version: v0.13.1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (25274b0) 82.93% compared to head (85d342a) 83.22%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #584      +/-   ##
==========================================
+ Coverage   82.93%   83.22%   +0.28%     
==========================================
  Files          28       28              
  Lines        3411     3416       +5     
==========================================
+ Hits         2829     2843      +14     
+ Misses        467      458       -9     
  Partials      115      115              

Files	Coverage Δ
suite.go	87.09% <100.00%> (+0.17%)	⬆️

... and 2 files with indirect coverage changes

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