docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/C/CursorMenu.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "RE/G/GameMenuBase.h"
+
+namespace RE
+{
+	class __declspec(novtable) CursorMenu :
+		public GameMenuBase  // 00
+	{
+	public:
+		static constexpr auto RTTI{ RTTI::CursorMenu };
+		static constexpr auto VTABLE{ VTABLE::CursorMenu };
+		static constexpr auto MENU_NAME{ "CursorMenu"sv };
+
+		// members
+		std::unique_ptr<BSGFxShaderFXTarget> cursor;  // E0
+	};
+	static_assert(sizeof(CursorMenu) == 0xE8);
+}