feat(sdbclient): belly stylesheet

WIP(sdbclient): better UI system

feat!(sdbclient): change to iyes_loopless states

chore(sdbclient): updated Cargo.lock

chore(sdbclient): iyes_loopless and belly deps

chore(sdbclient): update deps, Cargo.toml format

feat!(sdbclient): handle new error format

fix(sdbapi): apierror are now lowercase in json

feat(sdbapi): new error handling

feat(sdbapi): endpoint for joining games

docs(sdbapi): document /game/:id/join endpoint

docs(sdbapi): escape underscores in API doc

docs(sdbapi): document /game/my_games endpoint

feat(sdbapi): endpoint for getting own games

feat(sdbapi): endpoint for patching game state

feat(sdbapi): add GAMESTATE_CANCELLED

fix(sdbapi): remove redundant checks for user

feat(sdbapi): endpoint for all forming games

WIP(sdbapi): get all forming games

docs(sdbapi): get_forming > all_forming