test: add initial sanity test to pass CI

Author: Alex K

test/sanity.test.js

@@ -0,0 +1,8 @@
+// test/sanity.test.js
+import { describe, it, expect } from 'vitest';
+
+describe('CI Sanity Check', () => {
+  it('should always pass', () => {
+    expect(true).toBe(true);
+  });
+});