- Adjusted indentation and line breaks for structs, functions, and method calls to comply with Rust formatting standards.
- Improved error message formatting and consistency across `PkgTreeError` instances.
- Restructured long function arguments and chained calls for clarity and maintainability.
- Simplified conditional statements and loops for better readability.
- No functional changes introduced.
- Implemented incorporation lock functionality for packages, including pre-checks, addition, and retrieval methods.
- Enhanced package installation logic to handle incorporation constraints.
- Updated dependency versions in `Cargo.toml` and `Cargo.lock`, aligning with latest compatible releases.
- Introduced new tests to verify incorporation lock behavior, including scenarios with and without locks.
- Refactored code for improved readability and added error handling improvements.
- Fixed minor typos and inconsistencies in comments and log messages.
