VTex Preview order change

This endpoint allows you to simulate an order change and preview what the real change will look like if you use the [Create order change](https://developers.vtex.com/docs/api-reference/orders-api#patch-/api/order-system/orders/-changeOrderId-/changes) endpoint. A preview is especially useful for more complex scenarios, such as orders with multiple items and combinations of change operations — add, remove, and replace. Ensuring you get the desired results before making the actual change helps ...