feat(sdbapi): init game management apis

docs(sdbapi): add API docs to README.md

Change how user details are fetched

/token will now return the user ID as well

Assume running dev-launch with docker access

Return user email from register

Add a temporary version number to the API

Basic API with register and login (#1)

Reviewed-on: https://src.quest/skye/deck-builder/pulls/1