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

compatibility-tests/test-parcel1-react18/src/App.js

@@ -0,0 +1,6 @@
+import React from 'react'
+
+export default function App({obj}) {
+  console.log(obj)
+  return <div>hi</div>
+}

compatibility-tests/test-parcel1-react18/src/index.js

@@ -0,0 +1,19 @@
+// 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})
+
+// ReactDOM.render(
+//   <React.StrictMode>
+//     <App obj={obj} />
+//   </React.StrictMode>,
+//   document.getElementById('root'),
+// )