Initial commit.

boost-app/src/features/play/controls.test.js

boost-app/src/features/play/gameTreesSlice.js

boost-app/src/features/play/gameTreesSlice.test.js

boost-app/src/features/play/player.js

boost-app/src/features/play/player.module.css

boost-app/src/features/play/player.test.js

boost-app/src/features/play/playerTypes.js

boost-app/src/features/play/scoreSheet.js

boost-app/src/features/play/scoreSheet.module.css

boost-app/src/features/play/scoreSheet.test.js

...eatures/preferences/__snapshots__/piecesMenu.test.js.snap

boost-app/src/features/preferences/pieces/black/knight.svg

boost-app/src/features/preferences/pieces/black/pawn.svg

boost-app/src/features/preferences/pieces/black/tower.svg

boost-app/src/features/preferences/pieces/blue/knight.svg

boost-app/src/features/preferences/pieces/blue/pawn.svg

boost-app/src/features/preferences/pieces/blue/tower.svg

boost-app/src/features/preferences/pieces/cyan/knight.svg

boost-app/src/features/preferences/pieces/cyan/pawn.svg

boost-app/src/features/preferences/pieces/cyan/tower.svg