Implement Pattern in brush API

[Esemesek]

Feature Request

Currently there is Pattern brush, that was designed to be passed as a fill attribute, but it doesn't quite work. There are some missing parts in lib/helpers.js that need to be implemented.

More info here.

How it should work

import {Shape, Pattern} from '@react-native-community/art';
import someImage from '../images/image.png';


function Component() {
  return (
    <Shape d="{PATH}" fill={new Pattern(someImage, WIDTH, HEIGHT)} />
  );
}

[msand]

You can also use https://github.com/react-native-community/react-native-svg#pattern until this gets implemented in art