[iOS] Large title text attributes

[eliperkins]

This adds support for changing largeTitleTextAttributes on navigation controllers, including custom font sizes, font families, etc.

See Apple docs here: https://developer.apple.com/documentation/uikit/uinavigationbar/2919946-largetitletextattributes

Supports #2090

Related to #1643

[anonrig]

What's the ETA on this PR? 👍

[brunolemos]

Needs rebase.

[eliperkins]

@brunolemos done

[eladgel]

@eliperkins when pushing from right a screen that has in it's navigatorStyling
navBarTransparent: true

the new screen navbar bg is set like this
navBarBackgroundColor: 'red',

the background of the title element get's the color of the navbar according to the statusBarColor,
when you scroll the bg turns red

[sreuter]

Should this transform to a smaller title when scrolling up, like in the Mail example here https://github.com/wix/react-native-navigation/issues/1643#issue-248144154?

Update Pardon me, it actually does that already. Awesome sauce!

[DazChong]

I'm having screen bottom section of flickering if using largeTitle on iPhone X, the refreshControl and content jumped when pull-to-refresh, large title overlap refreshControl, and randomly scrolling to top stuck with no rubber-band effect and cannot pull-to-refresh.

Update:
All the above issue gone with this combination:

• navigatorStyle: drawUnderNavBar: true
• FlatList/ScrollView: contentInsetAdjustmentBehavior={'automatic'}