feat: Add expandable step navigation for narrow viewports in Wizard Component layout page

[Who-is-PS]

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 85.71429% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.20%. Comparing base (ea2b35b) to head (9f78bfc).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/wizard/wizard-step-list.tsx	81.03%	11 Missing ⚠️
src/wizard/wizard-step-navigation-expandable.tsx	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4227      +/-   ##
==========================================
+ Coverage   97.18%   97.20%   +0.02%     
==========================================
  Files         883      887       +4     
  Lines       25866    25918      +52     
  Branches     9344     9373      +29     
==========================================
+ Hits        25137    25193      +56     
+ Misses        723      719       -4     
  Partials        6        6              

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