feat: Add style api for token

[amanabiy]

Description

Add a style prop to the Token component that allows consumers to customize background, border, color, border-radius, padding, and dismiss button styling.

Tested by:

• running locally, and through pipeline

Related links, issue #, if available: P391912008

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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.44%. Comparing base (f5bcafe) to head (e8ba613).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4346   +/-   ##
=======================================
  Coverage   97.44%   97.44%           
=======================================
  Files         897      898    +1     
  Lines       26376    26420   +44     
  Branches     9523     9544   +21     
=======================================
+ Hits        25702    25746   +44     
+ Misses        668      631   -37     
- Partials        6       43   +37     

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[mxschll]

Should we have readOnly as well?

[mxschll]

We stopped filtering out undefined props because it costs performance and might sum up over time with many components using style api (reference: #4025 (comment)).

You can just return the style as-is, so instead of

const properties = {...

This

return { ... }