game state: start game, players auth

[maizy]

• [x] autogenerated uid
• [x] game state storage
  • [x] state: new, upcoming, running, ended
  • [x] meta data
  • [x] owner
  • [x] users
• [x] basic webtemplate
• [x] create game form
• [x] game state change
  • [x] lobby
  • [x] join links
  • [x] start game
  • [x] finish game
• [x] basic happy path tests
  • [x] add ruleset
  • [x] create game
  • [x] join to game
  • [x] start game
  • [x] end game