Deleting the job manager when the cli finishes explicitly avoids random issues in the tests when the cli is called repeatedly.

Use pixi to run doc build and tests.
Use pre-commit action to run qa.
Use pypi action to handle release.
Use a readthedocs workflow to build a preview for docs in a PR.
Use dependabot to keep things updated.
Update gitlab urls to github
Add a conventional-pre-commit hook
Create a COPYING file to indicate the license to Github interface
Cleanup pixi settings.
Add coverage reports
Fix coverage badge based on that

Co-authored-by: Yannick-Dayer <[email protected]>