docs: add plugin setup guide

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

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "RE/I/ImageSpaceEffect.h"
+
+namespace RE
+{
+	class __declspec(novtable) ImageSpaceEffectOption :
+		public ImageSpaceEffect  // 00
+	{
+	public:
+		static constexpr auto RTTI{ RTTI::ImageSpaceEffectOption };
+		static constexpr auto VTABLE{ VTABLE::ImageSpaceEffectOption };
+
+		// members
+		NiTPrimitiveArray<bool> effectOn;  // B0
+	};
+	static_assert(sizeof(ImageSpaceEffectOption) == 0xC8);
+}