feature: UI: LDN Games Viewer

This window can be accessed via "Help" menu in the title bar.
This menu's data is synced with the in-app-list LDN game data, and that has been modified to hide unjoinable games (in-progress and/or private (needing a passphrase)). You can still see these games in the list.

src/Ryujinx/UI/Helpers/Converters/LocaleKeyValueConverter.cs

@@ -0,0 +1,20 @@
+using Avalonia.Data.Converters;
+using CommandLine;
+using Ryujinx.Ava.Common.Locale;
+using System;
+using System.Globalization;
+
+namespace Ryujinx.Ava.UI.Helpers
+{
+    public class LocaleKeyValueConverter : IValueConverter
+    {
+        private static readonly Lazy<LocaleKeyValueConverter> _shared = new(() => new());
+        public static LocaleKeyValueConverter Shared => _shared.Value;
+
+        public object Convert(object value, Type _, object __, CultureInfo ___) 
+            => LocaleManager.Instance[value.Cast<LocaleKeys>()];
+
+        public object ConvertBack(object value, Type _, object __, CultureInfo ___)
+            => throw new NotSupportedException();
+    }
+}

src/Ryujinx/UI/Helpers/Win32NativeInterop.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Diagnostics.CodeAnalysis;
 using System.Runtime.InteropServices;
 using System.Runtime.Versioning;