CSS-in-JS Support?

A ton of people like CSS-in-JS and I think we should add support for it. We have to figure out how we will do it. I see 2 options:

1. Write our own using SWC macros once released #78
2. Add support for something like styled-components, though we would have to write our own SSR compiler thing

[ije]

0.3 will support inline css like:

export default function App() {
  return (
    <>
      <h1>Hello World</h1>
      <style>{`
        h1 {
          color: #d63369;
        }
      `}</style>
    </>
  )
}

[shadowtime2000]

@thegaryroberts Thanks for sharing how you do it, I think Emotions React pkg has out of the box support with renderToString and other React SSR stuff. We should probably add support for /** @jsx */, though it is also possible to just call jsx because it is compatible with React.createElement.