[Quest API] Add TrackNPC to Perl/Lua. (#2272)

* [Quest API] Add TrackNPC to Perl/Lua.
- Add quest::tracknpc(entity_id) to Perl.
- Add eq.track_npc(entity_id) to Lua.
- This will allow server operators to arbitrarily Track NPCs for clients with scripts.
- Modified tracking to auto turn off and tell you that you discovered your target if within 10 units, this is to allow scripted Tracking to turn off without the need for the Tracking skill.

* Remove unnecessary DoTracking() call.

* Update client.cpp

zone/questmgr.cpp

@@ -3688,3 +3688,12 @@ std::string QuestManager::getenvironmentaldamagename(uint8 damage_type) {
 	std::string environmental_damage_name = EQ::constants::GetEnvironmentalDamageName(damage_type);
 	return environmental_damage_name;
 }
+
+void QuestManager::TrackNPC(uint32 entity_id) {
+	QuestManagerCurrentQuestVars();
+	if (!initiator) {
+		return;
+	}
+
+	initiator->SetTrackingID(entity_id);
+}