fix(iOS): change RNSScreenDetentType enum to work correctly on Fabric

[aljs]

Description

When opening a formSheet (on iOS) from @react-navigation/native-stack on new arch I've experienced the same issue as #1686 . After some debugging I've discovered that sheetAllowedDetents={'large'} transfers to RNSScreenDetentTypeMedium and sheetAllowedDetents={'medium'} to RNSScreenDetentTypeLarge. This PR fixes it.

Changes

Updated ios/RNSEnums.h

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

[kkafar]

Hey @aljs, thanks for taking time for investigation and helping us out! However, I doubt that this is the real source of the issue. Most likely this fails because the feature has not been released & tested with react-navigation. I mean, it is possible to use it, as the props passed via react-navigation components fall through to react-native-screens components however there is some JS logic missing on side of react-navigation. I'll put it into my backlog! Thanks again!

[kkafar]

Yep, I've not merged iOS detents to react-navigation yet, there is JS logic missing there.
Thank you for contribution, I'll handle this in @react-navigation repo.