message: Add example to README
diff: Render React components to Figma.
  +```javascript
  +import * as React from 'react';
  +import { Page, Rectangle, Text } from 'react-figma';
  +
  +export const App = () => {
  + return (
  + <Page name="New page">
  + <Rectangle style={{ width: 200, height: 100, backgroundColor: '#dd55aa' }} />
  + <Text characters="text" style={{ color: '#ffffff' }} />
  + </Page>
  + );
  +};
  +```
  +
  <p align="center"><img src="./demo.gif" width="800"></p>
  +
  +
  +## Installation
  +
  +Install it with yarn:
  +
  +```
  +yarn add react-figma yoga-layout
  +```
  +
  +Or with npm:
  +
  +```
  +npm i react-figma yoga-layout --save
  +```
  