feat(medusa): Get route for admin product categories API (#2961)

integration-tests/api/factories/index.ts

@@ -22,3 +22,4 @@ export * from "./simple-payment-collection-factory"
 export * from "./simple-order-edit-factory"
 export * from "./simple-order-item-change-factory"
 export * from "./simple-customer-factory"
+export * from "./simple-product-category-factory"

integration-tests/api/factories/simple-product-category-factory.ts

@@ -0,0 +1,12 @@
+import { Connection } from "typeorm"
+import { ProductCategory } from "@medusajs/medusa"
+
+export const simpleProductCategoryFactory = async (
+  connection: Connection,
+  data: Partial<ProductCategory> = {}
+): Promise<ProductCategory> => {
+  const manager = connection.manager
+  const address = manager.create(ProductCategory, data)
+
+  return await manager.save(address)
+}