feat(medusa, types, utils, core-flows, order) request & accept order transfer (#10106)

**What**
- add request order transfer workflow
- add admin endpoint for transferring an order to a customer
- accept order transfer storefront endpoint
- accept transfer workflow
- changes in the order module to introduce new change and action types

---

**Note**
- we return 400 instead 409 currently if there is already an active order edit, I will revisit this in a followup
- endpoint for requesting order transfer from the storefront will be added in a separate PR

---

RESOLVES CMRC-701
RESOLVES CMRC-703
RESOLVES CMRC-704
RESOLVES CMRC-705

packages/core/utils/src/core-flows/events.ts

@@ -25,6 +25,8 @@ export const OrderWorkflowEvents = {
 
   CLAIM_CREATED: "order.claim_created",
   EXCHANGE_CREATED: "order.exchange_created",
+
+  TRANSFER_REQUESTED: "order.transfer_requested",
 }
 
 export const UserWorkflowEvents = {

packages/core/utils/src/order/order-change-action.ts

@@ -14,4 +14,5 @@ export enum ChangeActionType {
   SHIP_ITEM = "SHIP_ITEM",
   WRITE_OFF_ITEM = "WRITE_OFF_ITEM",
   REINSTATE_ITEM = "REINSTATE_ITEM",
+  TRANSFER_CUSTOMER = "TRANSFER_CUSTOMER",
 }