Added playlist view.

Harmonia.WinUI/Views/PlaylistView.xaml.cs

@@ -0,0 +1,57 @@
+using Harmonia.Core.Playlists;
+using Harmonia.WinUI.ViewModels;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Input;
+using System.Threading.Tasks;
+
+namespace Harmonia.WinUI.Views;
+
+public sealed partial class PlaylistView : UserControl
+{
+    private readonly PlaylistViewModel _viewModel;
+
+    public PlaylistView()
+    {
+        InitializeComponent();
+        _viewModel = (PlaylistViewModel)DataContext;
+    }
+
+    private void Image_Loaded(object sender, RoutedEventArgs e)
+    {
+        //Image? image = sender as Image;
+
+        //if (image == null)
+        //    return;
+
+        //image.DataContextChanged += Image_DataContextChanged;
+
+        //var song = (PlaylistSong)image.DataContext;
+
+        //if (song == null)
+        //    return;
+
+        //Task.Run(async () => await FetchImage(song.Song, image));
+    }
+
+    private void Image_Unloaded(object sender, RoutedEventArgs e)
+    {
+        //Image? image = sender as Image;
+
+        //if (image == null)
+        //    return;
+
+        //image.DataContextChanged -= Image_DataContextChanged;
+    }
+
+    private async void PlaylistListViewItem_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
+    {
+        if (sender is not FrameworkElement element)
+            return;
+
+        if (element == null || element.DataContext is not PlaylistSong playlistSong)
+            return;
+
+        await _viewModel.PlaySongAsync(playlistSong);
+    }
+}