UI: More advanced customization for what happens when Ryujinx loses focus

src/Ryujinx/Utilities/Configuration/UI/FocusLostType.cs

@@ -0,0 +1,15 @@
+using Ryujinx.Common.Utilities;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.Ava.Utilities.Configuration.UI
+{
+    [JsonConverter(typeof(TypedStringEnumConverter<FocusLostType>))]
+    public enum FocusLostType
+    {
+        DoNothing,
+        BlockInput,
+        MuteAudio,
+        BlockInputAndMuteAudio,
+        PauseEmulation
+    }
+}