implement getVorgaenge API endpoint

src/routes/api/list/+server.ts

@@ -0,0 +1,14 @@
+import { getVorgaenge } from '$lib/server/vorgangService';
+import { json } from '@sveltejs/kit';
+
+export async function GET({ locals }) {
+	if (!locals.user) {
+		return json({ error: 'Unauthorized' }, { status: 401 });
+	}
+
+	const vorgaenge = getVorgaenge();
+
+	return new Response(JSON.stringify(vorgaenge), {
+		status: 200
+	});
+}