Add Radio Browser station importer

src/radio/loadRadioStations.ts

@@ -0,0 +1,12 @@
+import type { RadioStation } from './radioTypes.js';
+
+export async function loadRadioStations(): Promise<RadioStation[]> {
+  const response = await fetch('/data/radio-stations.json');
+
+  if (!response.ok) {
+    throw new Error(`Failed to load radio stations: ${response.status}`);
+  }
+
+  const stations = (await response.json()) as RadioStation[];
+  return Array.isArray(stations) ? stations : [];
+}