Shipment and Order reference numbers added

[sierdweidema]

Shipment and Order reference numbers added to the CustomerInvoiceLine model

[what-the-diff[bot]]

PR Summary

• Add new properties to CustomerInvoiceLine Added soShipmentNbr, soOrderType, and soOrderNbr properties to enhance the available information on customer invoice lines.
• Improve code readability Reorganized using statements at the beginning of the file for better readability and maintainability.