docs: add plugin setup guide

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

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "RE/B/BSFixedString.h"
+#include "RE/N/NiPointer.h"
+
+namespace RE
+{
+	class NiTexture;
+
+	namespace BSGraphics
+	{
+		class Texture;
+	}
+
+	class ImageSpaceLUTData
+	{
+	public:
+		// members
+		BSFixedString        filename[4];   // 00
+		float                weight[4];     // 20
+		NiPointer<NiTexture> niTexture[4];  // 30
+		BSGraphics::Texture* texture[4];    // 50
+	};
+	static_assert(sizeof(ImageSpaceLUTData) == 0x70);
+}