- 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.
- Added support for obsoleted package database with separate handling in `ImageCatalog`.
- Enhanced apply manifest functionality with progress callback support and processing statistics.
- Introduced LZ4 compression for manifest storage in `ImageCatalog`.
- Removed debugging eprintln statements, replaced with structured logging.
- Updated `pkg6` image creation and installation logic to improve user feedback and error handling.
- Updated database initialization and build processes to handle new obsoleted logic.
- Cleaned up imports across multiple modules for better organization and removed unused dependencies.
- Eliminated `ActionOrder` implementation from `executors` as it's no longer being utilized.
- Simplified error handling in `get_dependencies` using `unwrap_or_else`.
- Optimized test setups with consistent use of `tempdir` helper function.
- Implemented `executors` module for applying manifests with support for directories, files, and links.
- Added `action_plan` module to merge and execute install plans from manifests.
- Introduced `run_sample_install.sh` script for testing installations, including dry-run and real execution.
- Enhanced `pkg6` install logic to resolve and apply action plans.
- Improved manifest management with `save_manifest` and repository-based fetching.
