First fully working user management, move to layout groups

src/routes/(main)/+layout.svelte

@@ -0,0 +1,14 @@
+<script>
+import Header from '$lib/components/Header.svelte'
+
+</script>
+
+<Header>
+	<ul class=site_header slot=links>
+	<li><a href="/rezepte">Rezepte</a></li>
+	<li><a href="/bilder">Bilder</a></li>
+	<li><a href="/git">Git</a></li>
+	<li><a href="/transmission">Transmission</a></li>
+	</ul>
+	<slot></slot>
+</Header>