feat(medusa): Include external_id in CreateProductInput type (#2498)

packages/medusa/src/types/product.ts

@@ -133,6 +133,7 @@ export type CreateProductInput = {
   mid_code?: string
   material?: string
   metadata?: Record<string, unknown>
+  external_id?: string | null
 }
 
 export type CreateProductProductTagInput = {