Finish the CONTRIBUTING Guidelines

[apmoore1]

The contributing guidelines are currently under development. Some resources on how to create guidelines and examples guidelines can be found below:

1. https://the-turing-way.netlify.app/project-design/project-repo/project-repo-participation.html
2. https://github.com/PurpleBooth/a-good-readme-template/blob/main/CONTRIBUTING.md
3. https://github.com/explosion/spaCy/blob/master/CONTRIBUTING.md
4. https://github.com/allenai/allennlp/blob/main/CONTRIBUTING.md

[apmoore1]

Another good resource: https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors

[apmoore1]

The contributing guidelines should also include a section on how to release a version of PyMUSAS, e.g. change the version number in the code, and in the CITATION.cff file and that the version number should adhere to semantic versioning