대부분 모든기능 제작

하단 player연결, 일시정지, 스킵, 볼륨, 특정시간재생, queue 디자인 변경, queue 변경기능 제작

bot/src/utils/api/Spotify.ts

@@ -124,7 +124,7 @@ export const Spotify = {
     const lowerQuery = query.toLocaleLowerCase().trim();
     if (searchCache.has(lowerQuery)) return searchCache.get(lowerQuery) ?? null;
     const track = (await this.getSearchFull(query) ?? [])?.[0];
-    if (track.url) searchCache.set(lowerQuery, track.url);
-    return track.url;
+    if (track?.url) searchCache.set(lowerQuery, track.url);
+    return track?.url ?? null;
   }
 }