Implement Order interface

[jsattler]

The Order interface allows you to create, modify and delete orders. In addition, you can query the order book and the status of individual orders, as well as view the display the cost statement for an order.

In particular, the following use cases need to be implemented:

• [ ] Dimensions
• [ ] Orders by Depot ID
• [ ] Order by Order ID
• [ ] Order Pre-Validation
• [ ] Order Validation
• [ ] Generate Order Cost Indication Ex-Ante