* add the bones of an OpenAPI client generation mechanism ([929894f](https://gitlab.developers.cam.ac.uk/uis/devops/iam/activate-account/api/commit/929894f5209d90ce0439e80f321f980091f449a8)), closes [#24](https://gitlab.developers.cam.ac.uk/uis/devops/iam/activate-account/api/issues/24)