adding desktop 2 app with electron forge

packages/desktop2/src/app.tsx

@@ -0,0 +1,10 @@
+import "./index.css";
+
+import * as React from "react";
+import * as ReactDOM from "react-dom";
+
+function render() {
+  ReactDOM.render(<h2>Hello from React!</h2>, document.getElementById("root"));
+}
+
+render();