refactor(src/services): rename MprisPlayer to PlayerService and streamline MPRIS integration

Remove legacy PlayerManager implementation and simplify signal handling for DBus players

src/services/__init__.py

@@ -4,7 +4,8 @@ from .brightness import Brightness  # noqa: F401
 from .capslock import CapsLock  # noqa: F401
 from .keyboard_layout import KeyboardLayout  # noqa: F401
 from .network import NetworkClient, Wifi, Ethernet  # noqa: F401
-from .mpris import MprisPlayer, MprisPlayerManager  # noqa: F401
+from .mpris import PlayerService, PlayerManager  # noqa: F401
+from .mpris import PlayerService as MprisPlayer, PlayerManager as MprisPlayerManager  # noqa: F401
 from .todo import TodoService  # noqa: F401
 from .modus import ModusService  # noqa: F401
 from .config import on_config_change, start_config_service, ConfigService  # noqa: F401