Added UI app.

MangaReader.WinUI/Views/SearchView.xaml.cs

@@ -0,0 +1,12 @@
+using MangaReader.Core.Search;
+using Microsoft.UI.Xaml.Controls;
+
+namespace MangaReader.WinUI.Views;
+
+public sealed partial class SearchView : UserControl
+{
+    public SearchView()
+    {
+        InitializeComponent();
+    }
+}