[Bots] Add attack flag when told to attack (#4490)

This adds a flag to mobs that are told to attack by their owner to prevent unintended attacks.

Previously, if you were to send your bots to attack a target and then switch targets: before casters land their spell or if melee (especially anyone with pets)  hasn't engaged before the target switch, they could switch to your new target and attack.

This adds a flag upon attack and bots will only attack flagged targets.

zone/mob.cpp

@@ -129,7 +129,8 @@ Mob::Mob(
 	position_update_melee_push_timer(500),
 	hate_list_cleanup_timer(6000),
 	mob_close_scan_timer(6000),
-	mob_check_moving_timer(1000)
+	mob_check_moving_timer(1000),
+	bot_attack_flag_timer(10000)
 {
 	mMovementManager = &MobMovementManager::Get();
 	mMovementManager->AddMob(this);
@@ -400,6 +401,10 @@ Mob::Mob(
 	pet_owner_npc     = false;
 	pet_targetlock_id = 0;
 
+	//bot attack flag
+	bot_attack_flags.clear();
+	bot_attack_flag_timer.Disable();
+
 	attacked_count = 0;
 	mezzed         = false;
 	stunned        = false;
@@ -8623,3 +8628,23 @@ bool Mob::IsCloseToBanker()
 
 	return false;
 }
+
+bool Mob::HasBotAttackFlag(Mob* tar) {
+	if (!tar) {
+		return false;
+	}
+
+	std::vector<uint32> l = tar->GetBotAttackFlags();
+
+	for (uint32 e : l) {
+		if (IsBot() && e == CastToBot()->GetBotOwnerCharacterID()) {
+			return true;
+		}
+
+		if (IsClient() && e == CastToClient()->CharacterID()) {
+			return true;
+		}
+	}
+
+	return false;
+}