misc: chore: [ci skip] small Avalonia project restructure

Moved the Views that existed in the Controls namespace into the Ryujinx.Ava.UI.Views.Misc namespace
Moved UpdateWaitWindow to Ryujinx.Ava.UI.Windows

src/Ryujinx/UI/Views/Misc/DlcSelectView.axaml.cs

@@ -0,0 +1,50 @@
+using Avalonia.Controls;
+using Avalonia.Styling;
+using FluentAvalonia.UI.Controls;
+using Ryujinx.Ava.Common.Locale;
+using Ryujinx.Ava.Common.Models;
+using Ryujinx.Ava.UI.Controls;
+using Ryujinx.Ava.UI.Helpers;
+using Ryujinx.Ava.UI.ViewModels;
+using Ryujinx.Ava.Utilities.AppLibrary;
+using System.Threading.Tasks;
+
+namespace Ryujinx.Ava.UI.Views.Misc
+{
+    public partial class DlcSelectView : RyujinxControl<DlcSelectViewModel>
+    {
+        public DlcSelectView()
+        {
+            InitializeComponent();
+        }
+
+#nullable enable
+        public static async Task<DownloadableContentModel?> Show(ulong selectedTitleId, ApplicationLibrary appLibrary)
+#nullable disable
+        {
+            DlcSelectViewModel viewModel = new(selectedTitleId, appLibrary);
+
+            ContentDialog contentDialog = new()
+            {
+                PrimaryButtonText = LocaleManager.Instance[LocaleKeys.Continue],
+                SecondaryButtonText = string.Empty,
+                CloseButtonText = string.Empty,
+                Content = new DlcSelectView { ViewModel = viewModel }
+            };
+
+            Style closeButton = new(x => x.Name("CloseButton"));
+            closeButton.Setters.Add(new Setter(WidthProperty, 80d));
+
+            Style closeButtonParent = new(x => x.Name("CommandSpace"));
+            closeButtonParent.Setters.Add(new Setter(HorizontalAlignmentProperty,
+                Avalonia.Layout.HorizontalAlignment.Right));
+
+            contentDialog.Styles.Add(closeButton);
+            contentDialog.Styles.Add(closeButtonParent);
+
+            await ContentDialogHelper.ShowAsync(contentDialog);
+
+            return viewModel.SelectedDlc;
+        }
+    }
+}