feat: Add exchange return shipping (#8108)

* wip

* finalize tests

* feat: Add exchange return shipping

* add shipping to preview

* test input

* move utils and ignore already inserted shipping method

* use custom price

---------

Co-authored-by: Carlos R. L. Rodrigues <rodrigolr@gmail.com>

packages/modules/order/src/services/actions/create-exchange.ts

@@ -5,13 +5,13 @@ import {
 } from "@medusajs/types"
 import {
   ChangeActionType,
+  OrderChangeType,
   ReturnStatus,
   getShippingMethodsTotals,
   isString,
   promiseAll,
 } from "@medusajs/utils"
 import { ExchangeItem, OrderExchange, Return, ReturnItem } from "@models"
-import { OrderChangeType } from "@types"
 
 function createExchangeAndReturnEntities(em, data, order) {
   const exchangeReference = em.create(OrderExchange, {