feat: persist layout state across pages

src/pages/404.tsx

@@ -1,15 +1,14 @@
-import React from "react"
+import React, { Fragment } from "react"
 
-import { Layout } from "../components/Layout"
 import { SEO } from "../components/SEO"
 
 function NotFoundPage() {
   return (
-    <Layout>
+    <Fragment>
       <SEO title="404: Not found" />
       <h1>NOT FOUND</h1>
       <p>You just hit a route that doesn&#39;t exist... the sadness.</p>
-    </Layout>
+    </Fragment>
   )
 }