Autoadd-bindir

- Remove range-pinning ``python = ">=3.8.0,<4.0"``, only specify bottom-range ``">=3.8.0"``

- Remove rang-pinned dependencies ``tox``, ``nox``.

- Remove ``autoadd_bindir.cancel``-function

- Depend on ``sitecustomize-entrypoints>=1.1.0``

- Update **gh-action-pypi-publish** to **v1.8.3**

- Fix poetry installation in github-release-action.

- Add poetry version-pinning in github-release-action.

- Add github-actions for [linting](https://github.com/libranet/autoadd-bindir/actions/workflows/linting.yaml) and [testing](https://github.com/libranet/autoadd-bindir/actions/workflows/testing.yaml).
- Add boilerplate-files to comply with Github's [_Community Standards_](https://github.com/libranet/autoadd-bindir/community)

- Refactored make-file.

- Fix some typo's in docstrings.

- Test releasing via ``poetry-release``.