Basic projectile implementation (put sample version in FilthEaterModelView)

Zennysoft.Game.Ma/src/enemy/behaviors/PatrolBehavior.cs

@@ -88,4 +88,11 @@ public partial class PatrolBehavior : Node3D, IBehavior
   }
 
   private void PatrolTimer_Timeout() => SetPatrolTarget();
+
+  public void OnExitTree()
+  {
+    _patrolTimer.Stop();
+    _patrolTimer.Timeout -= PatrolTimer_Timeout;
+    _navigationAgent.WaypointReached -= NavigationAgent_WaypointReached;
+  }
 }