add typescript support in svelte files, .js to .ts

src/routes/(angemeldet)/+layout.server.ts

@@ -0,0 +1,9 @@
+import { redirect } from '@sveltejs/kit';
+
+/** @type {import('./$types').PageServerLoad} */
+export function load(event) {
+	if (!event.locals.user && event.url.pathname !== '/anmeldung') throw redirect(303, '/anmeldung');
+	return {
+		user: event.locals.user
+	};
+}