Added the ability to select a food printer

Starting with API V8, it became possible to get a dish printer.

The food printer can be obtained through IOperationService, using method TryGetDishPrinter.

For each department (IRestaurantSection you can get your own separate food printer. If you do not specify the department for which you want to get a dish printer, then an attempt will be made to get a dish printer for the restaurant department’s table by default.