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

examples/learn-example/components/Vega.tsx

@@ -0,0 +1,6 @@
+//  Wrapper for the Vega component
+import { Vega as VegaOg } from "react-vega";
+
+export default function Vega(props) {
+  return <VegaOg {...props} />;
+}