docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/A/ActiveEffectList.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "RE/B/BSTArray.h"
+#include "RE/B/BSTSmartPointer.h"
+
+namespace RE
+{
+	class ActiveEffectList
+	{
+	public:
+		// members
+		BSTArray<BSTSmartPointer<ActiveEffect>> data;       // 00
+		std::int8_t                             iterating;  // 18
+	};
+	static_assert(sizeof(ActiveEffectList) == 0x20);
+}