test: add minimal smoke test to enable CI test step

Author: dmsfiris

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
       - name: Tests
         env:
           CI: true
-        run: npm test -- --watchAll=false --passWithNoTests
+        run: npm test -- --watchAll=false
 
       - name: Build (CRA)
         env:

src/__tests__/smoke.test.jsx

@@ -0,0 +1,7 @@
+/*
+ * Copyright (C) 2025 Dimitrios S. Sfyris
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+test('smoke', () => {
+  expect(true).toBe(true);
+});