Add onLayout native events for Reanimated 2

Description

onLayout handler should work on UI thread

Motivation

measure() measures paddings with some infelicity, while onLayout returns correct height/width/etc.

Example

The following example is default accordion animation with opened/closed component inside

1. Closed => Open transition (height)

2. Open => Closed transition (height)

[terrysahaidak]

I would go with that approach. It gives freedom to the developer.

const handler = useAnimatedLayoutEvent((layout) => {
  "worklet";

  // do whatever you want
}, [])

<Animated.View onLayout={handler} />

[Ubax]

@terrysahaidak @AlexeyVlasenko Could you open a topic about that in discussion? This is more a feature request then issue.