feat: Support a11y_member_of

[marc2332]

Depends on #1039

• Adds a11y_member_of
• Open dropdowns will close when the focused node is not part of them

[codecov]

Codecov Report

Attention: Patch coverage is 85.06787% with 33 lines in your changes missing coverage. Please review.

Project coverage is 73.39%. Comparing base (94e463a) to head (d37bd3c).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/renderer/src/accessibility.rs	0.00%	21 Missing ⚠️
crates/renderer/src/app.rs	0.00%	4 Missing ⚠️
crates/hooks/src/use_focus.rs	76.92%	3 Missing ⚠️
crates/testing/src/test_handler.rs	88.88%	3 Missing ⚠️
crates/components/src/dropdown.rs	99.28%	1 Missing ⚠️
crates/state/src/accessibility.rs	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1040      +/-   ##
==========================================
+ Coverage   73.06%   73.39%   +0.33%     
==========================================
  Files         220      218       -2     
  Lines       27005    27408     +403     
==========================================
+ Hits        19732    20117     +385     
- Misses       7273     7291      +18     

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