implement wagon maintenance feature: add functionality to detach wagons and move them to maintenance status

apps/edr-freight-web/backoffice/src/services/api.ts

@@ -1850,6 +1850,15 @@ export const api = {
       () => TRAIN_BUILDER_INVALIDATIONS,
     ),
 
+    sendWagonToMaintenance: endpoint<{ id: string; wagonId: string }, TrainComposition>(
+      "train-builder",
+      "sendWagonToMaintenance",
+      ({ id, wagonId }) =>
+        trainBuilderService.sendWagonToMaintenance(id, wagonId).then((r) => r.data),
+      undefined,
+      () => TRAIN_BUILDER_INVALIDATIONS,
+    ),
+
     reorderWagons: endpoint<{ id: string; wagonIds: string[] }, TrainComposition>(
       "train-builder",
       "reorderWagons",