Add TryMoveAlong(distance, angle)

This will take a distance you would like to move and an EQ angle you
would like to move relative to current heading (so 0 is in front, 256
behind)

Exported to Lua as well

zone/mob.h

@@ -578,6 +578,7 @@ public:
 	void SetFlyMode(uint8 flymode);
 	inline void Teleport(glm::vec3 NewPosition) { m_Position.x = NewPosition.x; m_Position.y = NewPosition.y;
 		m_Position.z = NewPosition.z; };
+	void TryMoveAlong(float distance, float angle, bool send = true);
 
 	//AI
 	static uint32 GetLevelCon(uint8 mylevel, uint8 iOtherLevel);