Refactor pyproject.toml and enhance DockerComposeManager with type hints

- Updated dependencies and added Ruff configuration for linting in pyproject.toml.
- Improved type hinting in DockerComposeManager methods for better clarity.
- Created an empty __init__.py file in tests directory.

tests/test_compose_manager.py

@@ -1,10 +1,15 @@
-from pathlib import Path
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
 
 import pytest
 import yaml
 
 from compose import DockerComposeManager
 
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 def test_create_and_save_service(tmp_path: Path) -> None:
     compose_file: Path = tmp_path / "docker-compose.yml"