- 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- Clean up redundant and dead code, enhance comments, and replace outdated logic for file handling and metadata operations.
