Sax

Added
- Backend information to `CircuitInfo`.

Updated
- `klujax` package.
- Documentation.

Added
- `settings` field to netlist.

Updated
- GitHub Actions `publish.yml` workflow.
- Dependencies.

Added
- `forward-only` backend (39).
- Example to demonstrate usage of forward-only backend.
- Bug fixes related to forward-only backend.

Fixed
- CI configuration.
- Pinned minimum version of `numpy` in dependencies.

Added
- Validation for the number of ports.

Fixed
- Issues in `variability` notebook.
- Layout-aware notebook.

Added
- `extra_netlist_cleanup` argument.

Updated
- Docker image.
- Makefile.

Updated
- Makefile.
- Dockerfile.