View3D can untrack objects and zoom in different modes

- updateDistance zooms between 0 and infinity
- Camera switches from third person to bird's eye when reaching a set distance
- Only one subject can be tracked at a time

#story[1190]

racevisionGame/src/main/java/visualiser/Controllers/RaceController.java

@@ -225,6 +225,10 @@ public class RaceController extends Controller {
             trackBoat.start();
         }
         view3D.updatePivot(new Translate(250, 0, 210));
+
+        view3D.setOnScroll(e -> {
+            view3D.updateDistance(e.getDeltaY());
+        });
     }