Enhance WHMCS data transformer and shared status definitions with new invoice statuses

- Added 'Refunded' and 'Pending' statuses to the WHMCS data transformer for improved status mapping.
- Updated shared status definitions to include 'Refunded' for consistency across the application.

apps/bff/src/vendors/whmcs/transformers/whmcs-data.transformer.ts

@@ -211,9 +211,11 @@ export class WhmcsDataTransformer {
       paid: "Paid",
       unpaid: "Unpaid",
       cancelled: "Cancelled",
+      refunded: "Refunded",
       overdue: "Overdue",
       collections: "Collections",
       draft: "Draft",
+      "payment pending": "Pending",
     };
 
     return statusMap[status?.toLowerCase()] || "Unpaid";

packages/shared/src/status.ts

@@ -14,6 +14,7 @@ export const INVOICE_STATUS = {
   UNPAID: "Unpaid",
   OVERDUE: "Overdue",
   CANCELLED: "Cancelled",
+  REFUNDED: "Refunded",
   COLLECTIONS: "Collections",
 } as const;