Add back CustomMatchers.d.ts ambient declaration file

Author: aryaemami59

packages/toolkit/src/tests/utils/CustomMatchers.d.ts

@@ -0,0 +1,11 @@
+import type { Assertion, AsymmetricMatchersContaining } from "vitest"
+
+interface CustomMatchers<R = unknown> {
+  toHaveConsoleOutput(expectedOutput: string): Promise<R>
+  toMatchSequence(...matchers: Array<(arg: any) => boolean>): R
+}
+
+declare module "vitest" {
+  interface Assertion<T = any> extends CustomMatchers<T> {}
+  interface AsymmetricMatchersContaining extends CustomMatchers {}
+}