Add GeometryReader support

[Kyle-Ye]

Close #473

[codecov]

Codecov Report

❌ Patch coverage is 0% with 155 lines in your changes missing coverage. Please review.
✅ Project coverage is 24.18%. Comparing base (ca15b69) to head (ee95ef9).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...enSwiftUICore/Layout/Geometry/GeometryReader.swift	0.00%	142 Missing ⚠️
Sources/OpenSwiftUICore/Layout/Layout.swift	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #475      +/-   ##
==========================================
- Coverage   24.33%   24.18%   -0.16%     
==========================================
  Files         471      472       +1     
  Lines       27415    27565     +150     
==========================================
- Hits         6671     6666       -5     
- Misses      20744    20899     +155     

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