实现移动平台乘客接口，优化乘客跟随逻辑

Assets/_Game/Scripts/Editor/Scene/SceneObjectPlacerTool.cs

@@ -804,6 +804,7 @@ namespace BaseGames.Editor
 
             MovingPlatform platform = GetOrAddComponent<MovingPlatform>(go);
             AssignReference(platform, "_passengerSensor", sensorCol, report);
+            AssignLayerMask(platform, "_passengerLayer", new[] { "Player", "Enemy" }, report);
             AssignObjectArray(platform, "_wayPoints", new Object[] { wpA, wpB }, report);
 
             report.Add("WaypointA / WaypointB 为移动端点，可将其拖出平台并在场景中调整位置。");