Add multi-ScrollView detection and best match selection

[loinsir]

Summary

• Add findAllScrollViews method to detect all ScrollViews intersecting with overlay area
• Implement best match selection logic based on intersection area calculation
• When multiple ScrollViews have equal maximum intersection area, select the last one added
• Add comprehensive test cases for multi-ScrollView scenarios

Changes

Core Implementation

• ActivatedOverlayArea: Add intersectionArea(with:) method to calculate intersection area with a given rect
• DynamicOverlayScrollViewProxy:
  • Add findAllScrollViews(in:) public method
  • Update findScrollView(in:) to select best match based on maximum intersection area
  • Implement private extension for recursive ScrollView detection

Test Coverage

• testMultipleScrollViewsSelection: Verify selection of ScrollView with maximum intersection area
• testMultipleScrollViewsWithPartialOverlap: Test selection with partially overlapping ScrollViews
• testFindAllScrollViews: Verify detection of all intersecting ScrollViews
• testNoScrollViewWhenNoIntersection: Verify no selection when overlay doesn't intersect any ScrollView
• ViewRenderer: Fix window property handling for modern iOS scene-based architecture

Test plan

• Run all existing tests to ensure no regression
• Verify new test cases pass
• Test multi-ScrollView selection with different intersection scenarios
• Verify proper handling of edge cases (no intersection, equal areas)