Improve game model / conception

android/gradle.properties

fastlane/metadata/android/en-US/changelogs/66.txt

fastlane/metadata/android/fr-FR/changelogs/66.txt

lib/entities/cell.dart

lib/main.dart

lib/provider/data.dart

lib/ui/layout/board.dart

lib/ui/layout/game.dart

lib/ui/layout/parameters.dart

lib/ui/screens/home.dart

lib/ui/widgets/bar_select_cell_value.dart

lib/ui/widgets/button_game_restart.dart

lib/ui/widgets/button_game_resume.dart

lib/ui/widgets/button_game_start_new.dart

lib/ui/widgets/message_game_end.dart

lib/utils/board_animate.dart

lib/utils/board_utils.dart

lib/utils/game_utils.dart

pubspec.yaml