feat(iOS)!: change default of fullScreenSwipeShadowEnabled to true

[kkafar]

Description

This PR changes default value for fullScreenSwipeShadowEnabled prop to true - meaning that the shadow will be present by default
in simple_push animation on iOS (this is the platform default).

Important

When changing this value I've noticed that the fullScreenSwipeShadowEnabled does something different
than it suggests in type documentation & our GUIDE_FOR_LIBRARY_AUTHORS. Namely, it does effect simple_push animation
in every scenario, not only in full screen swipe gesture interactive transition. I think we should change the name
of the prop eventually.

Changes

Updated all the docs & code.

Test code and steps to reproduce

I've played around with Test1072. Just set stack animation to simple push.

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

[alduzy]

The changes look good, but your note is concerning.
We could indeed distinguish the prop name from fullScreenSwipe since it's not that closely related. Even shadowEnabled with current description would be less confusing in my opinion. It may be a good time for such change