Backport boilerplate changes (Card Client)

Backport boilerplate changes to the Card Client repository. This includes (where relevant):

• implement poetry for dependency management
• use of poetry poe to execute scripts
• run tests (tox) via poetry poe
• update any relevant pipeline checks
• include release-it
• setup pre-commit checks

For examples, look at https://gitlab.developers.cam.ac.uk/uis/devops/iam/activate-account/account-data-manager