implement jetpack behavior and remove hardcoded jetpacks (#411)

dGame/dBehaviors/JetPackBehavior.h

@@ -0,0 +1,28 @@
+#pragma once
+#include "Behavior.h"
+
+class JetPackBehavior final : public Behavior 
+{
+public:
+	int32_t m_WarningEffectID;
+	float m_Airspeed;
+	float m_MaxAirspeed;
+	float m_VerticalVelocity;
+	bool m_EnableHover;
+	bool m_BypassChecks = true; // from what I can tell this defaulted true in live
+
+	/*
+	 * Inherited
+	 */
+
+	explicit JetPackBehavior(const uint32_t behavior_id) : Behavior(behavior_id) {
+	}
+
+	void Handle(BehaviorContext* context, RakNet::BitStream* bit_stream, BehaviorBranchContext branch) override;
+
+	void UnCast(BehaviorContext* context, BehaviorBranchContext branch) override;
+
+	void Calculate(BehaviorContext* context, RakNet::BitStream* bit_stream, BehaviorBranchContext branch) override;
+
+	void Load() override;
+};