Fix physics with navmesh agent

- desactivate navmesh temporarly when knockback (MovementHandler TakeImpulse)

- Delete unit when HealthHandler Death called

- Made 150 units fight (for performance test)

Assets/Scripts/HealthHandler.cs

@@ -55,6 +55,8 @@ public class HealthHandler : MonoBehaviour
         {
             GlobalsVariable.AliveUnitsTeamB.Remove(_unit);
         }
+        
+        Destroy(gameObject);
     }
     
 }