[POC] DO NOT MERGE: Feat: Support Interactive Element in Default Header

[PieterVanZyl-Dev]

Adds support for default variant to use actions in header Adds a page inline-button-variant to showcase some use cases

This is a prototype to share with designer & visual team.

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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.36%. Comparing base (3ff95e9) to head (ec24b73). Report is 85 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2098      +/-   ##
==========================================
+ Coverage   94.87%   95.36%   +0.48%     
==========================================
  Files         677      690      +13     
  Lines       18273    18420     +147     
  Branches     6067     6145      +78     
==========================================
+ Hits        17337    17566     +229     
+ Misses        871      800      -71     
+ Partials       65       54      -11     

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