feat(admin,admin-ui,medusa): Add Medusa Admin plugin (#3334)

packages/admin-ui/ui/test/setup.ts

@@ -0,0 +1,19 @@
+import "@testing-library/jest-dom"
+import { vi } from "vitest"
+import "./mocks/medusa-react"
+
+const IntersectionObserverMock = vi.fn(() => ({
+  disconnect: vi.fn(),
+  observe: vi.fn(),
+  takeRecords: vi.fn(),
+  unobserve: vi.fn(),
+}))
+
+const ResizeObserverMock = vi.fn(() => ({
+  disconnect: vi.fn(),
+  observe: vi.fn(),
+  unobserve: vi.fn(),
+}))
+
+vi.stubGlobal("IntersectionObserver", IntersectionObserverMock)
+vi.stubGlobal("ResizeObserver", ResizeObserverMock)