Add logjam example

examples/logjam/src/log.test.js

@@ -0,0 +1,14 @@
+import { expect, it, vi, beforeEach, afterEach, describe } from 'vitest';
+import { log } from './log';
+
+describe.todo('logger', () => {
+  it('logs to the console in development mode', () => {
+    const spy = vi.spyOn(console, 'log');
+
+    log('Hello, world!');
+
+    expect(spy).toHaveBeenCalledWith('Hello, world!');
+
+    spy.mockRestore();
+  });
+});