🧪 test: add unit tests for MKMapSnapshotOptions

[google-labs-jules]

🎯 What: The testing gap addressed: Missing tests for MKMapSnapshotOptions
📊 Coverage: What scenarios are now tested: MKMapSnapshotOptions default arguments, explicit custom arguments, toPlatform(), hashCode, equality matching, and toString() output.
✨ Result: The improvement in test coverage: Tests completely cover the MKMapSnapshotOptions structure, catching any future mutations to logic or structure mapping.

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PR created automatically by Jules for task 10714664393395693005 started by @esenmx

[google-labs-jules]

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