refactor(game): extract cube.ts (Phase 3 of #132)#138

nodots merged 2 commits into

refactor/game-decomp-phase2-undonodots/backgammon-core:refactor/game-decomp-phase2-undofrom

refactor/game-decomp-phase3-cubenodots/backgammon-core:refactor/game-decomp-phase3-cubeCopy head branch name to clipboard