feat(iOS): back button subview for Fabric

[kkafar]

Also include RCTImage headers for Fabric

Description

Changes

Test code and steps to reproduce

Checklist

• [ ] Included code example that can be used to test this change
• [ ] Updated TS types
• [ ] Updated documentation:
  • [ ] https://github.com/software-mansion/react-native-screens/blob/main/guides/GUIDE_FOR_LIBRARY_AUTHORS.md
  • [ ] https://github.com/software-mansion/react-native-screens/blob/main/native-stack/README.md
  • [ ] https://github.com/software-mansion/react-native-screens/blob/main/src/types.tsx
  • [ ] https://github.com/software-mansion/react-native-screens/blob/main/src/native-stack/types.tsx
• [ ] Ensured that CI passes