[Improvement] Flee Overhaul (#4407)

* Lots of flee updates primarily based on TAKPs source

* Update Values to EQEmu values.

* Add rule

* Adjustments to fear pathing

* Flee/Pathing adjustments (More TAKP code adjusted)

* updates

* Updates (Massaged functions from TAKP source)

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Co-authored-by: Kinglykrab <kinglykrab@gmail.com>

zone/client.h

@@ -278,6 +278,8 @@ public:
 
 	std::vector<Mob*> GetRaidOrGroupOrSelf(bool clients_only = false);
 
+	bool CheckIfAlreadyDead();
+
 	void AI_Init();
 	void AI_Start(uint32 iMoveDelay = 0);
 	void AI_Stop();