Mock nanoid in jest

* ai/nanoid#395
* ai/nanoid#439
* for some reason, doesn't play nice with jest, so we'll do this until we can switch to a different test framework

tichu-clients/packages/tichu-web/src/setupTests.ts

@@ -3,3 +3,9 @@
 // expect(element).toHaveTextContent(/react/i)
 // learn more: https://github.com/testing-library/jest-dom
 import "@testing-library/jest-dom";
+
+jest.mock("nanoid", () => {
+  return {
+    nanoid: () => {},
+  };
+});