misc: Created generic type RyujinxControl to allow for more unified control view model definitions

src/Ryujinx/UI/Controls/RyujinxControl.cs

@@ -0,0 +1,18 @@
+using Avalonia.Controls;
+using Gommon;
+using Ryujinx.Ava.UI.ViewModels;
+using System;
+
+namespace Ryujinx.Ava.UI.Controls
+{
+    public class RyujinxControl<TViewModel> : UserControl where TViewModel : BaseModel
+    {
+        public TViewModel ViewModel
+        {
+            get => (TViewModel)DataContext ?? throw new InvalidOperationException(
+                $"Underlying DataContext is not of type {typeof(TViewModel).AsPrettyString()}; " +
+                $"Actual type is {DataContext?.GetType().AsPrettyString()}");
+            set => DataContext = value;
+        }
+    }
+}