Greet user (#21)

* ignore underscores

* great user and redirect to login on /app

* format

* pass user as property of data object

src/lib/components/Navigation/Navbar/Navbar.svelte

@@ -1,11 +1,13 @@
 <script lang="ts">
-	let { title }: { title: string } = $props();
+	let { title, username }: { title: string; username: string } = $props();
+
+	let greeting = $derived(`Welcome ${username}!`);
 </script>
 
 <header class="navbar justify-between bg-base-200 px-4">
 	<h2 class="prose prose-xl">Hestia</h2>
 	<h1 class="prose prose-2xl">{title}</h1>
-	<p class="prose prose-lg">Welcome!</p>
+	<p class="prose prose-lg">{greeting}</p>
 </header>
 
 <style>