Support other switch controller types (#487)

* Make controllers modular, support changing controller type

* return readable events

* signal hid events

* fix style

Ryujinx.HLE/Input/IHidDevice.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Ryujinx.HLE.Input
+{
+    interface IHidDevice
+    {
+        long Offset    { get; }
+        bool Connected { get; }
+    }
+}