Feature: Added sale voucher to check sale import.

Chore: Frontend moved from Moment to date-fns and from dd-MMM-yyyy to ISO Date format.

overlord/src/app/sales-import/sales-import.component.css

@@ -68,6 +68,29 @@
   background-color: rgba(0, 0, 0, 0.04);
 }
 
+tr.selected td {
+  border-bottom-color: transparent;
+}
+
+tr.detail-row {
+  height: 0;
+}
+
+tr.detail-row.collapsed {
+  display: none;
+}
+
+.detail-cell {
+  padding: 12px 16px 16px !important;
+  background-color: rgba(0, 0, 0, 0.02);
+}
+
+.vouchers-section {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
 .visually-hidden {
   position: absolute;
   width: 1px;