Feat/decline order edit (#2234)

**What**
- Decline an order edit from a store endpoint
- Refactor totals setting to a service method

Fixes CORE-502

packages/medusa-react/test/hooks/store/order-edits/mutations.test.ts

@@ -0,0 +1,30 @@
+import { useDeclineOrderEdit } from "../../../../src/"
+import { renderHook } from "@testing-library/react-hooks"
+import { createWrapper } from "../../../utils"
+
+describe("useCreateLineItem hook", () => {
+  test("creates a line item", async () => {
+    const declineBody = {
+      declined_reason: "Wrong color",
+    }
+
+    const { result, waitFor } = renderHook(
+      () => useDeclineOrderEdit("test-cart"),
+      {
+        wrapper: createWrapper(),
+      }
+    )
+
+    result.current.mutate(declineBody)
+
+    await waitFor(() => result.current.isSuccess)
+
+    expect(result.current.data.response.status).toEqual(200)
+    expect(result.current.data.order_edit).toEqual(
+      expect.objectContaining({
+        status: "declined",
+        ...declineBody,
+      })
+    )
+  })
+})