Re-do bundling, compat tests, and extension API (#174)

compatibility-tests/test-next/pages/index.js

@@ -0,0 +1,23 @@
+import Head from 'next/head'
+
+// import ReactDOM from 'react-dom'
+
+import studio from '@theatre/studio'
+import {getProject} from '@theatre/core'
+// import React from 'react'
+// import App from './App'
+
+studio.initialize({usePersistentStorage: false})
+
+const project = getProject('Project')
+const sheet = project.sheet('Sheet')
+const obj = sheet.object('Obj', {str: 'some string', num: 0})
+
+function App({obj}) {
+  console.log(obj)
+  return <div>hi</div>
+}
+
+export default function Home() {
+  return <App obj={obj}>hi</App>
+}