Function PersonelMenu allow employees to menu "P-M-P": add product to storage and modificate order and add payment to order offline.
Parameters for Class PersonelMenu:
add_product_to_storage- add new product to the storage
modificate_order- allow modification order (changing products)
payment- allow add payment to the order
Function PersonelMenu allow employees to menu "P-M-P": add product to storage and modificate order and add payment to order offline.
Parameters for Class PersonelMenu: add_product_to_storage- add new product to the storage modificate_order- allow modification order (changing products) payment- allow add payment to the order