add experimental ytmusic playback for external songs

src/main/features/core/youtube/index.ts

@@ -0,0 +1,18 @@
+import { ipcMain } from 'electron';
+import YTMusic from 'ytmusic-api';
+
+let youtubeApi: InstanceType<typeof YTMusic> | null = null;
+
+const getYoutubeApi = async (): Promise<InstanceType<typeof YTMusic>> => {
+    if (!youtubeApi) {
+        youtubeApi = new YTMusic();
+        await youtubeApi.initialize();
+    }
+    return youtubeApi;
+};
+
+ipcMain.handle('youtube-search', async (_event, query: string) => {
+    const api = await getYoutubeApi();
+    const results = await api.search(query);
+    return results;
+});