feat: Add horizontal direction to radio group

[jperals]

Description

API proposal: 3K5dAAa8Le31

How has this been tested?

With visual regression tests (CR-235704718)

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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.99%. Comparing base (abb494e) to head (8d7a83b).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3906   +/-   ##
=======================================
  Coverage   96.99%   96.99%           
=======================================
  Files         861      861           
  Lines       25207    25210    +3     
  Branches     9098     9100    +2     
=======================================
+ Hits        24450    24453    +3     
- Misses        710      751   +41     
+ Partials       47        6   -41     

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[taheramr]

suggested by AI to be fourth which is correct but this is not blocking at all :D, approving since no other issues found