feat(wifi): export DNS service from services package

src/services/__init__.py

@@ -4,6 +4,7 @@ from .battery import Battery  # noqa: F401
 from .brightness import Brightness  # noqa: F401
 from .capslock import CapsLock  # noqa: F401
 from .config import ConfigService, on_config_change, start_config_service  # noqa: F401
+from .dns import get_dns, set_dns  # noqa: F401
 from .keyboard_layout import KeyboardLayout  # noqa: F401
 from .modus import ModusService  # noqa: F401
 from .mpris import PlayerManager, PlayerService  # noqa: F401