trips) adding initial commit

src/routes/(protected)/api/cities/+server.ts

@@ -0,0 +1,9 @@
+import { json } from '@sveltejs/kit';
+import type { RequestHandler } from './$types';
+import { searchCities } from '$lib/server/plans.js';
+
+export const GET: RequestHandler = ({ url }) => {
+	const q = url.searchParams.get('q') ?? '';
+	const cities = searchCities(q);
+	return json(cities);
+};