feat(client): swap cur_game to be in global, and set it

feat(client, server, shared): vittumainen bandage päälle, olkoot stna.

wip!(client, shared): re-enable browsing games, sota

feat(client): derive Reflect for some types

feat(client): show title in play menu

feat(client): enable the play menu in a crippled state

feat!(client): move play ui, currently unused as well

chore: update copyright notices

chore(client): rename sdbclient to client

feat(sdbclient): start game API call

feat(sdbclient): browse own games

feat(sdbclient): join games

WIP(sdbclient): browse games from play screen

feat(sdbclient): finish create game ui

feat!(sdbclient): scrap game management UIs

feat(sdbclient): init new game management UIs