docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/B/BSAnimationGraphEvent.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "RE/B/BSFixedString.h"
+
+namespace RE
+{
+	class BSAnimationGraphEvent
+	{
+	public:
+		// members
+		const std::uint64_t holderID;  // 00
+		const BSFixedString tag;       // 08
+		const BSFixedString payload;   // 10
+	};
+	static_assert(sizeof(BSAnimationGraphEvent) == 0x18);
+}