[refactor][xs]: rename docs directory to site reflecting fact this is the full website.

site/components/prose.js

@@ -0,0 +1,13 @@
+export default function Prose({
+  children,
+  mdFile=null
+}) {
+  return (
+    <main className="prose mx-auto my-24">
+      {mdFile &&
+        <div dangerouslySetInnerHTML={{ __html: mdFile }} />
+      }
+      {children}
+    </main>
+  )
+}