replace redux with zustand

src/api/kvv.ts

@@ -0,0 +1,13 @@
+async function fetchKvvDepartures(stopId: number) {
+	const API_URL = `https://projekte.kvv-efa.de/sl3-alone/XSLT_DM_REQUEST?outputFormat=JSON&coordOutputFormat=WGS84[dd.ddddd]&depType=stopEvents&locationServerActive=1&mode=direct&name_dm=${stopId}&type_dm=stop&useOnlyStops=1&useRealtime=1&limit=6&line=kvv:22301:E:H:s25&line=kvv:21012:E:H:s25&line=kvv:21012:E:R:s25&line=kvv:22305:E:H:s25`;
+
+	const data = await fetch(API_URL, {
+		method: "GET",
+	});
+	if (!data.ok) {
+		throw new Error(`HTTP error! status: ${data.status}`);
+	}
+	return data;
+}
+
+export { fetchKvvDepartures };