Merge branch '41-improve-game-architecture' into 'master'

lib/cubit/settings_global_state.dart

lib/entities/cell.dart

lib/main.dart

lib/models/board.dart

lib/models/cell.dart

lib/models/game.dart

lib/models/settings_game.dart

lib/models/settings_global.dart

lib/models/types.dart

lib/provider/data.dart

lib/ui/layout/game.dart

lib/ui/layout/parameters.dart

lib/ui/layout/tileset.dart

lib/ui/painters/board_painter.dart

lib/ui/painters/parameter_painter.dart

lib/ui/screens/about_page.dart

lib/ui/screens/game_page.dart

lib/ui/screens/page_about.dart

lib/ui/screens/page_game.dart

lib/ui/screens/page_settings.dart