Add user name to Navbar component

src/routes/+layout.svelte

@@ -1,12 +1,12 @@
 <script lang="ts">
+  export let data;
   import Footer from "$lib/components/Footer.svelte";
   import Navbar from "$lib/components/Navbar.svelte";
   import "../app.css";
-
   // only show footer if scrolled to the bottom
 </script>
 
-<Navbar />
+<Navbar user={data.user} />
 <section>
   <slot />
 </section>