feat: add full width back gesture on ios

[JackShannon]

Description

#251

This is a hacky solution. I think in order for this to be part of the library there would need to be an option to turn it on/off.

Changes

Changed the gestureRecognizer to a UIPanGestureRecognizer.

Screenshots / GIFs

Here you can add screenshots / GIFs documenting your change.

You can add before / after section if you're changing some behavior.

Before

You have to swipe from the left edge

After

You can swipe from anywhere:

-->

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/master/guides/GUIDE_FOR_LIBRARY_AUTHORS.md
  • https://github.com/software-mansion/react-native-screens/blob/master/native-stack/README.md
  • https://github.com/software-mansion/react-native-screens/blob/master/createNativeStackNavigator/README.md
  • https://github.com/software-mansion/react-native-screens/blob/master/src/types.tsx
  • https://github.com/software-mansion/react-native-screens/blob/master/src/native-stack/types.tsx
• Ensured that CI passes

[JackShannon]

An alternative solution could be to add our own UIScreenEdgePanGestureRecognizer instead of UIPanGestureRecognizer. https://developer.apple.com/documentation/uikit/uiscreenedgepangesturerecognizer?language=objc

That way the api could be consistent with react navigations stack navigator and could use gestureResponseDistance to set the edges.

[WoLewicki]

I tested this PR and unfortunately it resolves in some nondeterministic behaviors like freeze of screen when trying to swipe the first screen on stack. I added another version of this PR in #1072. Can you check if it works as you would expect it to and if so, can we close this PR?

[JackShannon]

I tested this PR and unfortunately it resolves in some nondeterministic behaviors like freeze of screen when trying to swipe the first screen on stack. I added another version of this PR in #1072. Can you check if it works as you would expect it to and if so, can we close this PR?

Works brilliantly, thank you!