Added logic for tags and audio engine.

Harmonia.Core/Data/PlaylistRepository.cs

@@ -1,22 +0,0 @@
-using Harmonia.Core.Models;
-
-namespace Harmonia.Core.Data;
-
-public class PlaylistRepository : JsonFileRepository<Playlist>
-{
-    protected override string DirectoryName => string.Empty;
-
-    protected override string GetNewFileName()
-    {
-        for (int i = 0; i < 1000; i++)
-        {
-            string shortFileName = $"Playlist{i.ToString().PadLeft(3, '0')}.{Extension}";
-            string filePath = Path.Combine(DirectoryName, shortFileName);
-
-            if (File.Exists(filePath) == false)
-                return shortFileName;
-        }
-
-        throw new Exception("Unable to determine new fileName");
-    }
-}