chore: Add focus visible logic from core

[cansuaa]

Description

Moved the code from core repo. It is needed for avatar.

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

All modified and coverable lines are covered by tests ✅

Project coverage is 96.77%. Comparing base (b4e5bbb) to head (c99cc97).

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #3       +/-   ##
===========================================
+ Coverage   64.15%   96.77%   +32.62%     
===========================================
  Files          11       12        +1     
  Lines         159      217       +58     
  Branches       14       18        +4     
===========================================
+ Hits          102      210      +108     
+ Misses         54        7       -47     
+ Partials        3        0        -3     

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[jperals]

Why not move this code to component-toolkit instead of duplicating it?

[pan-kot]

Why not move this code to component-toolkit instead of duplicating it?

Let's create a follow-up task for this as adding the utilities to the toolkit requires more effort and adds significant delays as we need to wait for the new package version to be created.

[cansuaa]

Why not move this code to component-toolkit instead of duplicating it?

Let's create a follow-up task for this as adding the utilities to the toolkit requires more effort and adds significant delays as we need to wait for the new package version to be created.

As discussed in slack, the task is created.