Demo - Vite + Squint + React

NOTE! #6 needs to be merged first.

I have done the following changes:

moved the original demo to dev - as this is using extra plugins such as the Inspect (Which is awesome btw had no idea that existed) we can grow that project to help us debug and develop the extension.
added a react demo to the demo's. This is the official react demo when you run npm create vite@latest and choose their react template.
changed the esbuild to use jsx: "automatic" this will allow use to not have to include React in every file, this is the same way that react + vite works.

@borkdude would be awesome if you have a squint logo so that I can include it in the demo page 😉

cc @martinklepsch

squint-cljs / vite-plugin-squint