Fix circular import loop in homeassistant/helpers/entity.py (#87780)

Co-authored-by: J. Nick Koston <nick@koston.org>

homeassistant/helpers/entity.py

@@ -12,7 +12,7 @@ import logging
 import math
 import sys
 from timeit import default_timer as timer
-from typing import Any, Final, Literal, TypedDict, final
+from typing import TYPE_CHECKING, Any, Final, Literal, TypedDict, final
 
 import voluptuous as vol
 
@@ -40,10 +40,12 @@ from homeassistant.util import dt as dt_util, ensure_unique_string, slugify
 
 from . import device_registry as dr, entity_registry as er
 from .device_registry import DeviceEntryType
-from .entity_platform import EntityPlatform
 from .event import async_track_entity_registry_updated_event
 from .typing import StateType
 
+if TYPE_CHECKING:
+    from .entity_platform import EntityPlatform
+
 _LOGGER = logging.getLogger(__name__)
 SLOW_UPDATE_WARNING = 10
 DATA_ENTITY_SOURCE = "entity_info"