docs: add plugin setup guide

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

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "RE/N/NiPoint3.h"
+
+namespace RE
+{
+	class BSNavmeshWaypoint
+	{
+	public:
+		// members
+		NiPoint3      position;       // 00
+		std::uint16_t triangleIndex;  // 0C
+		std::uint32_t flags;          // 10
+	};
+	static_assert(sizeof(BSNavmeshWaypoint) == 0x14);
+}