Python 포맷팅과 pre-commit 설정

맥락:
- Python 코드만 대상으로 Ruff 기반 format/lint와 pre-commit hook을 도입한다.
- Cython game.pyx는 Ruff 대상에서 제외해 포맷터 충돌을 피한다.

변경:
- ruff와 pre-commit dev dependency 및 Ruff 설정을 추가했다.
- pre-commit config와 Python format/check 스크립트를 추가했다.
- Ruff format/check --fix 결과로 Python import 정렬과 포맷을 적용했다.

확인:
- uv sync --extra gui
- uv run pre-commit run --all-files
- scripts/check-python.sh
- uv run lost-cities-classic

tests/games/classic/test_masks.py

@@ -1,6 +1,7 @@
-from coolrl_lost_cities.games.classic.bots import RandomBot
 from coolrl_lost_cities.games.classic.game import Card, GameState, LostCitiesConfig
 
+from coolrl_lost_cities.games.classic.bots import RandomBot
+
 
 def test_legal_mask_has_action_in_nonterminal_phases() -> None:
     state = GameState.new_game(LostCitiesConfig(seed=3))
@@ -39,8 +40,8 @@ def test_unified_legal_mask_has_fixed_shape_across_phases() -> None:
     mask = state.unified_legal_mask()
     assert state.phase == "draw"
     assert len(mask) == config.action_size
-    assert all(value is False for value in mask[:config.card_action_size])
-    assert any(mask[config.card_action_size:])
+    assert all(value is False for value in mask[: config.card_action_size])
+    assert any(mask[config.card_action_size :])
 
 
 def test_random_fuzz_invariants() -> None: