[Zone] Zone State Improvements Part 3 (#4773)

* [Zone State] Additional improvements

* Return early

* Update zone_save_state.cpp

* Push

* Push

* Update zone.cpp

* Update zone_save_state.cpp

* Equip items that were dynamically added on restore

* IsZoneStateValid helper

* ZoneStateSpawnsRepository::PurgeInvalidZoneStates

* Add Zone:StateSaveClearDays and PurgeOldZoneStates

* spawn2 / unique_spawn block when restored from zone state

* One time purge

* Update zone_state_spawns_repository.h

* Update npc.cpp

* Update npc.cpp

* test

* ORDER BY spawn2_id

* Stuff

* Restored corpses shouldn't trigger events

* Fix weird edge case

zone/spawn2.h

@@ -75,6 +75,8 @@ public:
 	int16 GetConditionMinValue() const { return condition_min_value; }
 	int16 GetAnimation () { return anim; }
 	inline NPC *GetNPC() const { return npcthis; }
+	inline bool IsResumedFromZoneSuspend() const { return m_resumed_from_zone_suspend; }
+	inline void SetResumedFromZoneSuspend(bool resumed) { m_resumed_from_zone_suspend = resumed; }
 
 protected:
 	friend class Zone;
@@ -101,6 +103,7 @@ private:
 	EmuAppearance anim;
 	bool IsDespawned;
 	uint32  killcount;
+	bool m_resumed_from_zone_suspend = false;
 };
 
 class SpawnCondition {