feat: Convert all app files to JS

packages/backend/src/apps/xero/auth/is-still-verified.js

@@ -0,0 +1,8 @@
+import getCurrentUser from '../common/get-current-user.js';
+
+const isStillVerified = async ($) => {
+  const currentUser = await getCurrentUser($);
+  return !!currentUser.tenantName;
+};
+
+export default isStillVerified;