Catch broken non-free successor removal

What's Changed

• Fix #165 by @dfukagaw28 in #166
• updates link to documentation by @Nikoleta-v3 in #164

New Contributors

• @dfukagaw28 made their first contribution in #166
• @Nikoleta-v3 made their first contribution in #164

Full Changelog: 1.4.2...1.4.3

Make cleaning exhaustive

• Fix sort of murky processing when removing players
• Use a hypothesis settings profile for CI

Full Changelog: 1.4.1...1.4.2

New documentation and a rethought build

• Restructure the project to use pyproject.toml and tox
• Improve the documentation (reformatted doc-strings, migrating to Quarto and
  GitHub Pages)
• Minor fixes to ensure CI

Extended algorithms, abstract classes, and the algorithms submodule

• Add abstract classes for players, games and matchings.
• Implement extended algorithm for SR, and clean up HR/SM algorithms.
• Move all of the algorithms to their own module, matching.algorithms.
• Improvements to the test suite (using custom hypothesis strategies.)
• Minor bug fixes.

Improving SR and minor fixes

• Move unmatching to second phase in SR (allows for simple games.)
• Minor docs fixes.

Add initial hospital capacity check

• Add HR input check for non-positive hospital capacities.
• Remove recursive flag from isort call in CI.
• Minor clean up of README images.

Minor docs fixes.

• Temporarily catch a PytestWarning from nbval in one of the tutorial notebooks.
• Add a link to the JOSS paper from the README.

Acceptance to JOSS

Update the self-citation information in paper.bib to v1.3.

End of JOSS review: player copying, game metaclass and docs fixes.

• Players are now copied via copy.deepcopy when a game is created and the
  copies are used, leaving any originals unchanged.
• Formalise test and Python requirements in setup.py.
• Revert flaky forgetting fix from v1.2.1 and correct the flaky tests that were
  causing the issue.
• Replace the Game class with BaseGame and make it a metaclass via
  abc.ABCMeta.
• Fix bugs in documentation stopping build.

Documentation, JOSS paper and bug fixes

• Finish documentation.
• Complete paper for submission to JOSS.
• Catch flaky forgetting bug in Player.