fix: include all subviews when sorting by zIndex
fix: include all subviews when sorting by zIndex

Previously, non-React subviews were excluded from the sorted array.

ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos,ptmt/react-native-macos