- Create core module structure with models and effects subdirectories
- Add enums module with CardType, EnergyType, TurnPhase, StatusCondition, etc.
- Add RulesConfig with Mantimon TCG defaults (40-card deck, 4 points to win)
- Add RandomProvider protocol with SeededRandom (testing) and SecureRandom (production)
- Include comprehensive tests for all modules (97 tests passing)
Defaults reflect GAME_RULES.md: Pokemon Pocket-style energy deck,
first turn can attack but not attach energy, 30-turn limit enabled.