docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/I/INPUT_DEVICE.h

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace RE
+{
+	enum class INPUT_DEVICE : std::int32_t
+	{
+		kNone = static_cast<std::underlying_type_t<INPUT_DEVICE>>(-1),
+
+		kKeyboard = 0,
+		kMouse,
+		kGamepad,
+
+		kSupported,
+
+		kKinect = 3,
+		kVirtualKeyboard,
+
+		kTotal
+	};
+}