Functioning music player features

Co-authored-by: Copilot <copilot@github.com>

pubspec.yaml

@@ -34,6 +34,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
+  just_audio: ^0.10.5
 
 dev_dependencies:
   flutter_test: