Add support for React components

[BrunnerLivio]

related: #3

It's just an initial effort to give a baseline of the described feature :)

cc.ComponentNam
class ComponentName extends React.Component {
  render() {
    return (
      <div></div>
    );
  }
}

cc.ComponentName[name]
class ComponentName extends React.Component {
  render() {
    return (
      <div></div>
    );
  }
}

fc.ComponentName
const ComponentName = () => {
  return (
    <div></div>
  );
};

fc.ComponentName[firstName, lastName]
const ComponentName = ({firstName, lastName}) => {
  return (
    <div></div>
  );
};

[BrunnerLivio]

I'd encourage using early returns instead of nesting your code, like you did in the extension.generateReactHookSnippet command.

This leads to much simpler code in my eyes and also decreases the cyclomatic complexity
CodeAesthetics made a video about it if you're curious: https://www.youtube.com/watch?v=CFRhGnuXG-4

[BrunnerLivio]

This could be rewritten to use a switch/case instead or even better to use an appropriate data structure so you eliminate any branching code in the first place. But I leave that refactoring to another PR / to you :)