stubbed some more functions from kj's ai stuff

- fixed some typos
- cleaned some debug code

FFXIVClassic Map Server/actors/chara/ai/controllers/Controller.cs

@@ -33,7 +33,7 @@ namespace FFXIVClassic_Map_Server.actors.chara.ai.controllers
 
         public virtual void ChangeTarget(Character target)
         {
-            owner.aiContainer.InternalEngage(target);
+            owner.aiContainer.InternalChangeTarget(target);
         }
 
         public bool IsAutoAttackEnabled()

FFXIVClassic Map Server/actors/chara/ai/controllers/MobController.cs

@@ -24,6 +24,7 @@ namespace FFXIVClassic_Map_Server.actors.chara.ai.controllers
         public override bool Engage(Character target)
         {
             // todo: check distance, last swing time, status effects
+            this.owner.aiContainer.InternalEngage(target);
             return true;
         }