Migrate from Jest to node:test (#115)

frontend/test-client/src/utils/random-casing.test.ts

@@ -1,3 +1,5 @@
+import { describe, it } from "node:test";
+import assert from "node:assert";
 import { randomCasing } from "./random-casing";
 
 describe("randomCasing", () => {
@@ -5,7 +7,7 @@ describe("randomCasing", () => {
 		const input =
 			"hello, this is a really long string with a lot of characters";
 		const result = randomCasing(input);
-		expect(result.toLowerCase()).toBe(input.toLowerCase());
-		expect(result).not.toBe(input);
+		assert.strictEqual(result.toLowerCase(), input.toLowerCase());
+		assert.notStrictEqual(result, input);
 	});
 });