feat(keyboard): change radio group per arrow keys

[ph-fritsche]

What:

Check next/previous radio button in group per arrow keys.

Why:

Closes #843

How:

Add default behavior for keydown.

Checklist:

• Tests
• Ready to be merged

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[codecov]

Codecov Report

Merging #995 (e1fa521) into main (73e4347) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #995   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           86        87    +1     
  Lines         1849      1876   +27     
  Branches       686       697   +11     
=========================================
+ Hits          1849      1876   +27     

Impacted Files	Coverage Δ
src/event/behavior/keydown.ts	100.00% <100.00%> (ø)
src/utils/edit/walkRadio.ts	100.00% <100.00%> (ø)

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[github-actions]

🎉 This PR is included in version 14.3.0 🎉

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