Qualify CJS-only module imports

ts/test-node/util/i18n.ts

@@ -0,0 +1,21 @@
+// Copyright 2025 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+
+import { setupI18n } from '../../util/setupI18n.js';
+
+const PATH = join(
+  __dirname,
+  '..',
+  '..',
+  '..',
+  '_locales',
+  'en',
+  'messages.json'
+);
+
+export const enMessages = JSON.parse(readFileSync(PATH, 'utf8'));
+
+export default setupI18n('en', enMessages);