fix(medusa, pricing, types): pass dates as Date-objects rather than strings to the pricing module (#5768)

* init

* remove date string validator;

* add transformOptionalDate transformer to api

* move type conversion to the datalayer

* fix final module integration test

* update arrow-function

* make string optional

* move work to utils

* make check for value exists

* move util back to pricng

* change utils

* refactor get-iso-string

* fix build

* flip transform condition

* add null check for isDate

* feat(pricing): Separate Pricing Module internal types from `@medusajs/types` (#5777)

* create types for pricing repositories

* create RepositoryTypes input

* add service types

* use models for repository types

* fix build

* update types to match interface types

* add aliases

* types instead of moduletypes

* move repository to types for pricing module

* add changeset

* fix merge error

* fix conflict

* fix build

* re-add validation of dates in updatePriceLists_

packages/utils/src/common/get-iso-string-from-date.ts

@@ -0,0 +1,15 @@
+import { isDate } from "./is-date"
+import { MedusaError } from "./errors"
+
+export const GetIsoStringFromDate = (date: Date | string) => {
+  if (!isDate(date)) {
+    throw new MedusaError(
+      MedusaError.Types.INVALID_DATA,
+      `Cannot format date to ISO string: ${date}`
+    )
+  }
+
+  date = new Date(date)
+
+  return date.toISOString()
+}