Support other switch controller types (#487)

* Make controllers modular, support changing controller type

* return readable events

* signal hid events

* fix style

Ryujinx.HLE/Input/HidControllerConnState.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace Ryujinx.HLE.Input
+{
+    [Flags]
+    public enum HidControllerConnState
+    {
+        Controller_State_Connected = (1 << 0),
+        Controller_State_Wired     = (1 << 1)
+    }
+}