Adding initial playback bar logic.

Harmonia.UI/Converters/ArtistsToStringConverter.cs

@@ -0,0 +1,32 @@
+using Avalonia.Data.Converters;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+
+namespace Harmonia.UI.Converters;
+
+public class ArtistsToStringConverter : IValueConverter
+{
+    public ArtistsToStringConverter()
+    {
+
+    }
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not List<string>)
+            return string.Empty;
+
+        List<string> artists = (List<string>)value;
+
+        if (artists == null)
+            return string.Empty;
+
+        return string.Join(" / ", artists);
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return new List<string>();
+    }
+}