introducing standalone client UI for examples that use Daily prebuilt

examples/client/src/main.tsx

@@ -0,0 +1,18 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import App from "./App.tsx";
+import Header from "./components/header.tsx";
+import { DailyProvider } from "@daily-co/daily-react";
+
+import "./global.css";
+
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <Header />
+    <main>
+      <DailyProvider>
+        <App />
+      </DailyProvider>
+    </main>
+  </React.StrictMode>
+);