- Introduced `ImageCatalog` for handling catalog-related operations, including initialization, building from publishers, querying, and manifest management.
- Added `InstalledPackages` for managing installed package operations, such as adding, removing, querying, and retrieving manifests.
- Defined database schemas and error types to support both modules.
- Refactored table handling, ensuring consistent transaction scoping with `redb`.
- Implement unit tests to cover `Image` creation, metadata management, saving/loading, and error handling.
- Add separate constructors for `Full` and `Partial` image types (`new_full`, `new_partial`).
- Introduce robust path handling methods (`metadata_dir`, `image_json_path`) for consistent metadata structure.
- Enhance error diagnostics with `InvalidPath` variant in `ImageError`.
- Update `Cargo.toml` for test module inclusion.
