feat(admin-ui, medusa-js, medusa-react, medusa): Multiwarehousing UI (#3403)

* add "get-variant" endpoint

* import from a different place

* fix unit test

* add changeset

* inventory management for orders

* add changeset

* initial create-fulfillment

* add changeset

* type oas and admin

* Move inv. creation and listing from admin repo

* Fix location editing bug (CORE-1216)

* Fix default warehouse on inventory table view

* remove actions from each table line

* Use feature flag hook instead of context directly

* remove manage inventory action if inventory management is not enabled

* Address review comments

* fix queries made when inventorymodules are disabled

* variant form changes for feature enabled

* move exclamation icon into warning icon

* ensure queries are not run unless feature is enabled for create-fulfillment

---------

Co-authored-by: Philip Korsholm <philip.korsholm@hotmail.com>
Co-authored-by: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>

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

@@ -2,6 +2,9 @@ import {
   AdminGetVariantsVariantInventoryRes,
   AdminGetVariantsParams,
   AdminVariantsListRes,
+  StoreGetVariantsVariantParams,
+  AdminGetVariantParams,
+  AdminVariantsRes,
 } from "@medusajs/medusa"
 import qs from "qs"
 import { ResponsePromise } from "../.."
@@ -28,6 +31,27 @@ class AdminVariantsResource extends BaseResource {
     return this.client.request("GET", path, undefined, {}, customHeaders)
   }
 
+  /**
+   * Get a product variant
+   * @param id Query to filter variants by
+   * @param customHeaders custom headers
+   * @returns A list of variants satisfying the criteria of the query
+   */
+  retrieve(
+    id: string,
+    query?: AdminGetVariantParams,
+    customHeaders: Record<string, any> = {}
+  ): ResponsePromise<AdminVariantsRes> {
+    let path = `/admin/variants/${id}`
+
+    if (query) {
+      const queryString = qs.stringify(query)
+      path = `/admin/variants?${queryString}`
+    }
+
+    return this.client.request("GET", path, undefined, {}, customHeaders)
+  }
+
   /**
    *
    * @param variantId id of the variant to fetch inventory for