docs: add plugin setup guide

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

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "RE/B/BSPathingAvoidNode.h"
+
+namespace RE
+{
+	class TESObjectREFR;
+
+	class AvoidAreaStruct
+	{
+	public:
+		// members
+		BSPathingAvoidNode avoideNode;  // 00
+		float              timeExpire;  // 24
+		TESObjectREFR*     refObj;      // 28
+		AvoidAreaStruct*   next;        // 30
+	};
+	static_assert(sizeof(AvoidAreaStruct) == 0x38);
+}