docs: add plugin setup guide

plugin/lib/commonlibf4/include/Scaleform/G/GFx_ResourceLibBase.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "Scaleform/R/RefCountBase.h"
+
+namespace Scaleform::GFx
+{
+	class Resource;
+
+	class __declspec(novtable) ResourceLibBase :
+		public RefCountBase<ResourceLibBase, 2>  // 00
+	{
+	public:
+		// add
+		virtual void RemoveResourceOnRelease(Resource* a_res) = 0;  // 01
+		virtual void PinResource(Resource* a_res) = 0;              // 02
+		virtual void UnpinResource(Resource* a_res) = 0;            // 03
+	};
+	static_assert(sizeof(ResourceLibBase) == 0x10);
+}