feat: Add enter and exit focus mode methods to the plugin API

[georgylobko]

Description

Added a methods to programmatically expand and collapse the AI panel

updateDrawer({ type: 'expandDrawer', payload: { id: 'drawer-id' } });
updateDrawer({ type: 'exitExpandedMode' });

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 97.16%. Comparing base (9d9f437) to head (cadb937).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3916   +/-   ##
=======================================
  Coverage   97.16%   97.16%           
=======================================
  Files         850      850           
  Lines       24779    24786    +7     
  Branches     8733     8736    +3     
=======================================
+ Hits        24076    24083    +7     
+ Misses        696      654   -42     
- Partials        7       49   +42     

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