feat(medusa): Implement premises of order edit retrieval (#2183)

**What**
- Implements the admin/store retrieval end point 
- Service implementation of the retrieve method
- Service implementation of the computeLineItems method which aggregates the right line item based on the changes that are made
- client
  - medusa-js api
  - medusa-react queries hooks

**Tests**
- Unit tests of the retrieval end points
- Unit tests of the service retrieve method and computeLineItems
- Integration tests for admin/store
- client
  - medusa-js tests
  - medusa-react hooks tests

FIXES CORE-492

packages/medusa-js/src/resources/admin/index.ts

@@ -12,6 +12,7 @@ import AdminInvitesResource from "./invites"
 import AdminNotesResource from "./notes"
 import AdminNotificationsResource from "./notifications"
 import AdminOrdersResource from "./orders"
+import AdminOrderEditsResource from "./order-edits"
 import AdminPriceListResource from "./price-lists"
 import AdminProductTagsResource from "./product-tags"
 import AdminProductTypesResource from "./product-types"
@@ -48,6 +49,7 @@ class Admin extends BaseResource {
   public users = new AdminUsersResource(this.client)
   public returns = new AdminReturnsResource(this.client)
   public orders = new AdminOrdersResource(this.client)
+  public orderEdits = new AdminOrderEditsResource(this.client)
   public returnReasons = new AdminReturnReasonsResource(this.client)
   public variants = new AdminVariantsResource(this.client)
   public salesChannels = new AdminSalesChannelsResource(this.client)

packages/medusa-js/src/resources/admin/order-edits.ts

@@ -0,0 +1,15 @@
+import { AdminOrdersEditsRes } from "@medusajs/medusa"
+import { ResponsePromise } from "../../typings"
+import BaseResource from "../base"
+
+class AdminOrderEditsResource extends BaseResource {
+  retrieve(
+    id: string,
+    customHeaders: Record<string, any> = {}
+  ): ResponsePromise<AdminOrdersEditsRes> {
+    const path = `/admin/order-edits/${id}`
+    return this.client.request("GET", path, undefined, {}, customHeaders)
+  }
+}
+
+export default AdminOrderEditsResource