feat: prepare media resolver source kinds

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/media/mediaTypes.ts

@@ -1,7 +1,7 @@
 import type { Readable } from "node:stream";
 
 export type MediaMode = "music" | "screen";
-export type MediaSourceKind = "url" | "local";
+export type MediaSourceKind = "url" | "local" | "youtube" | "spotify" | "search";
 export type MediaQueueItemStatus = "queued" | "playing" | "failed";
 
 export interface ResolvedMediaSource {