[Web LA] Add skipEntering

[m-bert]

Summary

This PR adds partial support for LayoutAnimationConfig, i.e. skipEntering.

Note

skipExiting is not added in this PR as waiting for children animation is not yet supported on web.

Test plan

Tested on example from docs:

import React from 'react';
import Animated, {
  LayoutAnimationConfig,
  PinwheelIn,
  PinwheelOut,
} from 'react-native-reanimated';
import { Button, StyleSheet, View } from 'react-native';

export default function App() {
  const [outer, setOuter] = React.useState<boolean>(true);
  const [inner, setInner] = React.useState<boolean>(true);

  return (
    <View style={styles.container}>
      <View style={styles.buttonColumn}>
        <Button
          onPress={() => {
            setOuter(!outer);
          }}
          title={toggleString(outer) + ' outer'}
        />
        <Button
          disabled={!outer}
          onPress={() => {
            setInner(!inner);
          }}
          title={toggleString(inner) + ' inner'}
        />
      </View>
      <LayoutAnimationConfig skipEntering>
        {outer && (
          <Animated.View
            entering={PinwheelIn}
            exiting={PinwheelOut}
            style={styles.outerBox}>
            <LayoutAnimationConfig skipEntering skipExiting>
              {inner && (
                <Animated.View
                  style={styles.box}
                  entering={PinwheelIn}
                  exiting={PinwheelOut}
                />
              )}
            </LayoutAnimationConfig>
          </Animated.View>
        )}
      </LayoutAnimationConfig>
    </View>
  );
}

function toggleString(value: boolean) {
  return value ? 'Hide' : 'Show';
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'flex-start',
    height: 220,
  },
  buttonColumn: {
    flexDirection: 'column',
    alignItems: 'center',
    justifyContent: 'space-around',
    height: 90,
  },
  outerBox: {
    width: 150,
    height: 150,
    backgroundColor: '#b58df1',
    alignItems: 'center',
    justifyContent: 'center',
    borderRadius: 20,
    margin: 20,
  },
  box: {
    width: 80,
    height: 80,
    backgroundColor: '#782aeb',
  },
});