Integration with FGO invoicing

Automate the process of generating invoices and registering payments on the FGO invoicing system.

* Automatic invoice creation - each time a new order is created, the system can automatically create an invoice for the order using FGO service * Automatic action on Order Paid - When an order's payment is captured we can mark the invoice as paid in FGO * Automatic action on Order Cancelled - When an order is cancelled we can automatically cancel or delete the associated invoice * Multiple orders from the same customer can be grouped on one invoice * Support for SAGA integration

• Automatic invoice creation
• Invoice can be marked as collected automatically when the order is paid
• Checks FGO invoice payment status and updates the Shopify order financial status