[#814,tutorial,docs][xl]: add initial version of the second tutorial, rename basic-example to learn-example, clean up learn-example

examples/learn-example/pages/_app.tsx

@@ -0,0 +1,6 @@
+import '../styles/globals.css'
+import type { AppProps } from 'next/app'
+
+export default function App({ Component, pageProps }: AppProps) {
+  return <Component {...pageProps} />
+}