- Introduced `Image::refresh_catalogs` to support refreshing catalogs selectively or fully for specified publishers.
- Enhanced `CatalogManager::load` to handle missing fields gracefully, including fallback mechanisms for `packages`.
- Added detailed logging and error diagnostics for catalog parsing and directory operations.
- Improved publisher-specific directory management, including cleaning and recreating directories during full refresh.
- Updated tests to verify correct behavior for catalog directory clearing and new catalog handling logic.
- Add `ProgressReporter` trait with `start`, `update`, and `finish` methods for customizable progress tracking during operations.
- Implement `ProgressInfo` struct for detailed progress state reporting, including operation, progress, and context information.
- Create a no-op implementation `NoopProgressReporter` for cases where progress reporting is not needed.
- Enhance `pkg6` with structured error handling using `Pkg6Error` and new diagnostic variants for I/O, JSON, FMRI, and logging errors.
- Update `Image` functionality to leverage progress reporting during catalog downloads and include robust publisher management.
- Introduce `TestProgressReporter` for unit tests to validate progress reporting integration.
- Introduced creation of `pub.p5i` files for publishers to maintain compatibility with older repository formats.
- Implemented saving repository configuration in legacy INI format (`pkg5.repository`).
- Updated tests to validate the generation and structure of legacy files.
- Added new dependencies (`rust-ini`) and updated `Cargo.toml` and `Cargo.lock` accordingly.
- Eliminate obsolete assertions for the root `file` directory as it is no longer created.
- Update tests to validate file paths in `publisher`-specific directories, aligning with the updated repository structure.
- Simplify `create_directories` by removing unnecessary `file` directory creation.
- Eliminate redundant `test_manifest_parsing.rs` as its functionality is covered during `FileBackend` implementation.
- Define `PackageContentVectors` for streamlined data organization.
- Enhance manifest handling in `FileBackend` with recursive search, improved content extraction, and robust error handling.
- Simplify and centralize manifest parsing logic for maintainability and code clarity.
- Standardize formatting by aligning and cleaning up indentation, spacing, and line breaks across multiple modules.
- Enhance logging with improved message formatting for better context and readability.
- Simplify error handling in `pkg6dev`, `pkg6repo`, and core libraries by consolidating redundant patterns and improving clarity.
- Update test cases to reflect formatting and logging changes while extending coverage of edge cases.
- Perform general cleanup, including removing unused imports, refining comments, and ensuring consistent style.
- Update `FileBackend` to store files in a multi-level directory structure (`xx/yy/hash`) based on hash prefixes.
- Adjust method signatures and logic across `FileBackend`, `pkg6dev`, and `pkg6repo` to support mutable repository operations.
- Add test cases and scripts (`test_file_structure.rs`, `test_repo_operations.sh`) to validate the new file structure.
- Refactor catalog manager to use `RefCell` for interior mutability to enable lazy initialization.
- Clean up redundant and dead code, enhance comments, and replace outdated logic for file handling and metadata operations.
