- 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.
- Implement parsing and mapping of new action types: `User`, `Group`, `Driver`, `Legacy`, and `Transform` within `Manifest`.
- Introduce comprehensive test coverage for the newly supported actions, including edge cases for `ftpuser` property in manifests.
- Refactor to leverage `HashSet` for user `services` to avoid duplicates.
- Improve comments and error handling during action parsing for enhanced clarity and robustness.
