Improve focus order for new annotations

[karenrasmussen]

This pull request enhances the user experience in the annotation sidebar by automatically moving keyboard focus to the first updated annotation after real-time updates. This makes it easier for users to quickly locate and interact with the most recently updated content. Additionally, the test suite is updated to support the new focus and tab selection functionality.

User experience improvements:

• After receiving real-time annotation updates, the sidebar now moves keyboard focus to the first updated annotation and selects the appropriate tab for it, improving accessibility and usability. [1] [2]

Testing updates:

• The StreamerService test suite is updated to stub the new selectTab and setAnnotationFocusRequest methods, ensuring the new functionality is properly tested.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.50%. Comparing base (5589e5c) to head (0b7b8b3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7483   +/-   ##
=======================================
  Coverage   99.50%   99.50%           
=======================================
  Files         271      271           
  Lines       11027    11035    +8     
  Branches     2656     2657    +1     
=======================================
+ Hits        10972    10980    +8     
  Misses         55       55           

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