Libssa

After a while without news, **LIBSsa v2.5** is here. For users, almost no feature was added, but for the development cycle, I included many changes. In particular:

- Compatibility with **Python 3.11**
- Inclusion of [pre-commit](https://pre-commit.com/) and some hooks
- Inclusion of [ruff](https://docs.astral.sh/ruff/) as default linter and formatter (_previouslly I was using just my IDE [PyCharm]_)
- Local environment now uses [uv](https://docs.astral.sh/uv/), with a new/reformulated `uv.lock` (instead old `requirements.txt`)
- Updated actions for publishing into **TestPyPI** and **PyPI**
- A lot of other stuff...

I hope to bring new updates regarding the software itself in new releases :smiley:

This is the "ready-to-use" version of LIBSsa after the editorial process of [JOSS](https://joss.theoj.org/) (Journal of Open Source Software). This release includes several improvements based on reviewers, including (but not limited to):

- Better README
- Contributing guidelines
- Simple tests usint `pytest`
- [PyPI](https://pypi.org/project/libssa/) packaging (users can install with `pip install libssa`)
- [Zenodo](https://zenodo.org/) DOI

This is the first version of the application made available to the general audiences, as the repository has now been made public.