docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/S/SCRIPT_REFERENCED_OBJECT.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "RE/B/BSStringT.h"
+
+namespace RE
+{
+	class SCRIPT_REFERENCED_OBJECT
+	{
+	public:
+		// members
+		BSString      editorID;    // 00
+		TESForm*      form;        // 10
+		std::uint32_t variableID;  // 18
+	};
+	static_assert(sizeof(SCRIPT_REFERENCED_OBJECT) == 0x20);
+}