feat(medusa): Add writable type

packages/medusa/src/types/common.ts

@@ -7,6 +7,8 @@ export type PartialPick<T, K extends keyof T> = {
   [P in K]?: T[P]
 }
 
+export type Writable<T> = { -readonly [key in keyof T]: T[key] }
+
 export type TotalField =
   | "shipping_total"
   | "discount_total"