feat: Horizontal variant of steps

[timogasda]

Description

Related links, issue #, if available: n/a

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

❌ Patch coverage is 45.83333% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.12%. Comparing base (4806683) to head (ae978c5).
⚠️ Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
src/steps/internal.tsx	40.90%	11 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3959      +/-   ##
==========================================
- Coverage   97.16%   97.12%   -0.05%     
==========================================
  Files         854      854              
  Lines       24981    25013      +32     
  Branches     8802     8819      +17     
==========================================
+ Hits        24274    24294      +20     
- Misses        659      711      +52     
+ Partials       48        8      -40     

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