Add commit linting to allow for the generation of a more human-readable changelog for releases

[Jennifer Power]

Is your feature request related to a problem? Please describe.

Inconsistency in the commit history can make it difficult to understand what has changed between releases.

Describe the solution you'd like

• Choose a standard way of structuring commits/changes that is supported by existing changelog generation tools (e.g, conventional commit, gitmoji, labels)
• Add it to the .pre-commit-config.yaml
• Update the documentation for contributing

Additional context