[Kyle-Ye]

Summary

Add a public no-argument initializer to OpenQuartzCore.CALayer,
allowing clients to create layer instances outside the module.

Background

OpenSwiftUI's Android platform adapter creates a CALayer through
OpenQuartzCoreShims to provide layer identity to the shared
DisplayList view cache.

The synthesized initializer is internal, preventing this
cross-module construction. An explicit public initializer
enables it without changing the layer's stored properties
or default values.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 70.00%. Comparing base (df5ab4c) to head (043e22d).

Files with missing lines	Patch %	Lines
Sources/OpenQuartzCore/CALayer.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
- Coverage   70.11%   70.00%   -0.12%     
==========================================
  Files          14       14              
  Lines         629      630       +1     
==========================================
  Hits          441      441              
- Misses        188      189       +1     

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