infrastructure for mob skills loading

src/engine/gameManager/NPCManager.java

@@ -14,6 +14,7 @@ import org.pmw.tinylog.Logger;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ThreadLocalRandom;
 
 import static engine.math.FastMath.acos;
@@ -399,4 +400,8 @@ public enum NPCManager {
            }
         }
     }
+
+    public static void applyMobbaseSkills(Mob mob) {
+
+    }
 }