feat(sdbapi): endpoint for joining games

feat(sdbapi): endpoint for getting own games

feat(sdbapi): endpoint for patching game state

feat(sdbapi): endpoint for all forming games

WIP(sdbapi): game creation API

feat!(sdbapi): change errors to apierror

WIP(sdbapi): game info API endpoint

Basic API with register and login (#1)

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