isServerpodServerPackage function
Convenience function to check if a pubspec.yaml file is a Serverpod server package.
Returns true if the pubspec.yaml file is a Serverpod server package, false otherwise.
Implementation
bool isServerpodServerPackage(final File pubspecFile) {
  try {
    return TenantProjectPubspec.fromFile(pubspecFile).isServerpodServer();
  } catch (_) {
    return false;
  }
}