Add GestureDebug.ChildrenBox and implement GesturePhase.descriptionWithoutValue

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 19.79%. Comparing base (f201311) to head (9d1cbcf).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/OpenSwiftUICore/Event/Gesture/GestureDebug.swift	0.00%	8 Missing ⚠️
...penSwiftUICore/Event/Responder/ViewResponder.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #375      +/-   ##
==========================================
- Coverage   19.80%   19.79%   -0.01%     
==========================================
  Files         407      407              
  Lines       21675    21683       +8     
==========================================
  Hits         4292     4292              
- Misses      17383    17391       +8     

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