Updated AbstractOrder.php to return null instead of false in getShippingStatus() when the shipping
status is not set. This makes the method's behaviour more consistent.

Updated Search.php to add a condition check for class existence before retrieving shipping status.
This ensures that the code will not fail if the class is not defined.

Modified DataLayer.php to add a condition check for class existence before retrieving shipping.

Added @phpstan-ignore-next-line in Utils.php to silence phpstan for the next line of code.

Related: #172

refactor: merge product list method -> Takes a product array and brings together all products that can be brought together

feat: payment changeable -> payment methods can be changed after the order process, if there was an error during the payment process

feat: refactor: getOrderProcessUrl -> new param step, its easier to get a url from a orderprocess step