Introduce a complete Craps implementation featuring a Phaser-based UI,
deterministic game logic, and heuristic AI players.
Key changes:
- CrapsLogic.js: Pure-state rules engine handling Pass/Don't Pass, Place,
Come/Don't Come, Field bets, odds, and full resolution logic.
- CrapsAI.js: Stateless AI personalities (conservative, balanced, aggressive,
gambler) derived from player names to drive betting behavior.
- CrapsGame.js: Phaser scene with animated dice rolls, chip tray, dynamic
bet zones, portrait-based opponents, and persistence via profile API.
- Wire Craps into the game registry, main scene loader, and GameRoom dispatcher.
