Add support for animate string value with %

[piaskowyk]

Description

Add support for animate string value with %
Fixes: #1613

Example code

Example code

import Animated, {
  useSharedValue,
  withTiming,
  useAnimatedStyle,
  Easing,
} from 'react-native-reanimated';
import { View, Button } from 'react-native';
import React from 'react';

export default function AnimatedStyleUpdateExample(props) {
  const randomWidth = useSharedValue('10%');
  
  const config = {
    duration: 500,
    easing: Easing.bezier(0.5, 0.01, 0, 1),
  };

  const style = useAnimatedStyle(() => {
    return {
      width: withTiming(randomWidth.value, config),
    };
  });

  return (
    <View>
      <Animated.View
        style={[
          { width: '100%', height: 80, backgroundColor: 'black' },
          style,
        ]}
      />
      <Button
        title="toggle"
        onPress={() => {
          randomWidth.value = Math.random() * 100 + '%' ;
        }}
      />
    </View>
  );
}

[jakub-gonet]

Could you add some examples, update TS types if necessary, and update docs?

[karol-bisztyga]

Looks alright.
Could you please add an example where the 'pt' unit occurs?
Maybe @Szymon20000 could do a code review here?

[jakub-gonet]

Please don't force push into branches that have a pull request and reviews. It removes old commits, so you can't check history at the time of writing comments.