feat(spotify): integrate Spotify API for playlist metadata and track retrieval

package-lock.json

@@ -20494,7 +20494,7 @@
       "license": "MIT"
     },
     "src/backend": {
-      "version": "2.0.11",
+      "version": "2.1.1",
       "license": "UNLICENSED",
       "dependencies": {
         "@distube/ytdl-core": "^4.16.12",
@@ -20953,7 +20953,7 @@
       }
     },
     "src/frontend": {
-      "version": "2.0.11",
+      "version": "2.1.1",
       "dependencies": {
         "@angular/animations": "^19.0.6",
         "@angular/common": "^19.0.6",