docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/D/DesiredMovementData.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include "RE/N/NiPoint3.h"
+
+namespace RE
+{
+	class DesiredMovementData
+	{
+	public:
+		// members
+		NiPoint3A position;       // 00
+		NiPoint3A orientation;    // 10
+		NiPoint3A movementSpeed;  // 20
+		NiPoint3A rotationSpeed;  // 30
+	};
+	static_assert(sizeof(DesiredMovementData) == 0x40);
+}