Feat: Shipping functionalities redesign, elta courier integration, commenting out acs since no integration can happen, flow updates

src/Shipping/Contracts/IssuesVoucherOnPrint.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Modules\Core\Shipping\Contracts;
+
+/**
+ * A carrier whose shipments are created as pending records and only get a
+ * voucher number when the label is printed (ELTA). Until then the shipment
+ * has no tracking_reference and can still be cancelled; printLabel()
+ * issues the voucher. Its shipments get a tab on the Pending Vouchers
+ * screen, like carriers with a manifest step.
+ */
+interface IssuesVoucherOnPrint
+{
+}