Add ViewGraphFeatureBuffer

[Kyle-Ye]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 5.19481% with 73 lines in your changes missing coverage. Please review.

Project coverage is 19.81%. Comparing base (958481b) to head (f88e420).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
.../OpenSwiftUICore/View/Graph/ViewGraphFeature.swift	0.00%	60 Missing ⚠️
Sources/OpenSwiftUICore/View/Graph/ViewGraph.swift	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #179      +/-   ##
==========================================
- Coverage   20.08%   19.81%   -0.27%     
==========================================
  Files         291      291              
  Lines        9900     9949      +49     
==========================================
- Hits         1988     1971      -17     
- Misses       7912     7978      +66     

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