Feat(medusa, medusa-js, medusa-react): order edit item update (#2246)

**what**
Support `updateLineItem` which does the following:
- If no item change exist then create a new one and attaches the clone item with the adjustments and tax lines
- if an item change exists then delete/create adjustments and tax lines and update the cloned item quantity

**Tests**
- Unit tests core + client
- integration tests
  - When no item change already exists
  - When an item change already exists

FIXES CORE-497

packages/medusa-js/src/resources/admin/order-edits.ts

@@ -2,6 +2,7 @@ import {
   AdminOrderEditDeleteRes,
   AdminOrderEditItemChangeDeleteRes,
   AdminOrderEditsRes,
+  AdminPostOrderEditsEditLineItemsLineItemReq,
   AdminPostOrderEditsOrderEditReq,
   AdminPostOrderEditsReq,
 } from "@medusajs/medusa"
@@ -50,7 +51,7 @@ class AdminOrderEditsResource extends BaseResource {
     const path = `/admin/order-edits/${orderEditId}/changes/${itemChangeId}`
     return this.client.request("DELETE", path, undefined, {}, customHeaders)
   }
-  
+
   requestConfirmation(
     id: string,
     customHeaders: Record<string, any> = {}
@@ -58,7 +59,7 @@ class AdminOrderEditsResource extends BaseResource {
     const path = `/admin/order-edits/${id}/request`
     return this.client.request("POST", path, undefined, {}, customHeaders)
   }
-  
+
   cancel(
     id: string,
     customHeaders: Record<string, any> = {}
@@ -66,6 +67,16 @@ class AdminOrderEditsResource extends BaseResource {
     const path = `/admin/order-edits/${id}/cancel`
     return this.client.request("POST", path, undefined, {}, customHeaders)
   }
+
+  updateLineItem(
+    orderEditId: string,
+    itemId: string,
+    payload: AdminPostOrderEditsEditLineItemsLineItemReq,
+    customHeaders: Record<string, any> = {}
+  ): ResponsePromise<AdminOrderEditsRes> {
+    const path = `/admin/order-edits/${orderEditId}/items/${itemId}`
+    return this.client.request("POST", path, payload, {}, customHeaders)
+  }
 }
 
 export default AdminOrderEditsResource