- Introduced `transformer.rs` with a structured approach for parsing and applying transformation rules.
- Added support for operations like `add`, `default`, `delete`, `drop`, `edit`, `emit`, and `set` on attributes, files, directories, and other targets.
- Implemented regex-based matching for patterns and backreference handling in transformations.
- Enhanced manifest modification functionality, including attribute/facet operations and deferred action emission.
- Added comprehensive unit tests to validate transformation rules and their applications.
