Click to edit UI (#385)

- [x] add e2e test - happy case (make sure it clears selection and next
prompt is empty, and preview is cleared); de-selection case
- [x] shim - old & new file
- [x] upgrade path
- [x] add docs
- [x] add try-catch to parser script
- [x] make it work for next.js
- [x] extract npm package
- [x] make sure plugin doesn't apply in prod

e2e-tests/fixtures/import-app/select-component/src/main.tsx

@@ -0,0 +1,5 @@
+import { createRoot } from "react-dom/client";
+import App from "./App.tsx";
+import "./styles/globals.css";
+
+createRoot(document.getElementById("root")!).render(<App />);