chore: fix logic around changelog

[SMoraisAnsys]

Fix the architecture used to work with changelog.
On top of that, URLs have been added to the pyproject.toml file and the section of the changelog have been reordered to be more aligned with what users might want to consider first (very subjective).

[github-actions]

The towncrier template has been successfully rewritten with the default template.
Please ensure that sphinx-design is included as a dependency in your project's documentation requirements.
Additionally, add sphinx-design to the extensions list in your conf.py file.
For more information, please refer to the migration guide at:
https://actions.docs.ansys.com/version/stable/migrations/index.html#migration-guide