feat(medusa,types): product variant store endpoints (#13730)

* wip(medusa): product variant store endpoints

* chore: refactor types

* chore: changesets

* fix: address feedback 1

* feat: load images for variants by default

* fix: use query.graph directly instead of refetchEntity

* feat: enable cache for variants endpoint

packages/medusa/src/api/middlewares.ts

@@ -58,6 +58,7 @@ import { storePaymentProvidersMiddlewares } from "./store/payment-providers/midd
 import { storeProductCategoryRoutesMiddlewares } from "./store/product-categories/middlewares"
 import { storeProductTagRoutesMiddlewares } from "./store/product-tags/middlewares"
 import { storeProductTypeRoutesMiddlewares } from "./store/product-types/middlewares"
+import { storeProductVariantRoutesMiddlewares } from "./store/product-variants/middlewares"
 import { storeProductRoutesMiddlewares } from "./store/products/middlewares"
 import { storeRegionRoutesMiddlewares } from "./store/regions/middlewares"
 import { storeReturnReasonRoutesMiddlewares } from "./store/return-reasons/middlewares"
@@ -119,6 +120,7 @@ export default defineMiddlewares([
   ...adminFulfillmentsRoutesMiddlewares,
   ...adminFulfillmentProvidersRoutesMiddlewares,
   ...storeProductRoutesMiddlewares,
+  ...storeProductVariantRoutesMiddlewares,
   ...storeReturnReasonRoutesMiddlewares,
   ...adminReturnReasonRoutesMiddlewares,
   ...adminClaimRoutesMiddlewares,