fix(core-flows,types,medusa): pass /store/shipping-options fields to workflow (#13527)

cc @willbouch since you asked to be tagged if I opened this PR.

The /store/shipping-options is one of only 2 store endpoints to not allow custom `fields` to be passed(other one is /store/returns if you guys want to add it to the backlog). This PR fixes that so that custom linked models can also be retrieved.

Note: This fix reveals a bug in the next.js starter

https://github.com/medusajs/nextjs-starter-medusa/blob/eac359cc8d52f1d33d8712e18e4e0f38940afb3e/src/lib/data/fulfillment.ts#L23-L24

`fields` was previously ignored, now it errors since it tries to parse the misspelled "fulfllment"(the i is missing). It worked before since both fields are already defined by default inside the workflow. So the `fields` line is totally redundant and should be removed(ideally before merging this).   
Maybe in the next release notes it should also warn users to remove it for those that already have a modified copy of the starter.

packages/core/core-flows/src/cart/workflows/list-shipping-options-for-cart.ts

@@ -15,11 +15,8 @@ import {
   AdditionalData,
   ListShippingOptionsForCartWorkflowInput,
 } from "@medusajs/types"
-import { filterObjectByKeys, isDefined } from "@medusajs/framework/utils"
-import {
-  pricingContextResult,
-  shippingOptionsContextResult,
-} from "../utils/schemas"
+import { deduplicate, filterObjectByKeys, isDefined } from "@medusajs/framework/utils"
+import { pricingContextResult, shippingOptionsContextResult } from "../utils/schemas"
 
 export const listShippingOptionsForCartWorkflowId =
   "list-shipping-options-for-cart"
@@ -256,9 +253,9 @@ export const listShippingOptionsForCartWorkflow = createWorkflow(
       }
     )
 
-    const shippingOptions = useRemoteQueryStep({
-      entry_point: "shipping_options",
-      fields: [
+    const fields = transform(input, ({ fields = [] }) => {
+      return deduplicate([
+        ...fields,
         "id",
         "name",
         "price_type",
@@ -286,7 +283,11 @@ export const listShippingOptionsForCartWorkflow = createWorkflow(
         "calculated_price.*",
         "prices.*",
         "prices.price_rules.*",
-      ],
+      ])
+    })
+    const shippingOptions = useRemoteQueryStep({
+      entry_point: "shipping_options",
+      fields,
       variables: queryVariables,
     }).config({ name: "shipping-options-query" })