saveGroupOverrides function
Save group overrides to file
Implementation
Future<void> saveGroupOverrides(Map<String, String> overrides) async {
final file = File('group-overrides.yaml');
final buffer = StringBuffer();
buffer.writeln('# Package category overrides');
buffer.writeln('# Format: package_name: Category Name');
buffer.writeln();
final sortedKeys = overrides.keys.toList()..sort();
for (final key in sortedKeys) {
buffer.writeln('$key: ${overrides[key]}');
}
await file.writeAsString(buffer.toString());
}