Add the LED functionality to the base IGamepad interface

src/Ryujinx/Input/AvaloniaKeyboard.cs

@@ -142,6 +142,8 @@ namespace Ryujinx.Ava.Input
 #pragma warning restore IDE0055
             }
         }
+        
+        public void SetLed(uint packedRgb) { }
 
         public void SetTriggerThreshold(float triggerThreshold) { }
 

src/Ryujinx/Input/AvaloniaMouse.cs

@@ -73,6 +73,8 @@ namespace Ryujinx.Ava.Input
         {
             throw new NotImplementedException();
         }
+        
+        public void SetLed(uint packedRgb) { }
 
         public void SetTriggerThreshold(float triggerThreshold)
         {