Add switch setup type hints [g-m] (#63303)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/ihc/switch.py

@@ -1,5 +1,10 @@
 """Support for IHC switches."""
+from __future__ import annotations
+
 from homeassistant.components.switch import SwitchEntity
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import IHC_CONTROLLER, IHC_INFO
 from .const import CONF_OFF_ID, CONF_ON_ID
@@ -7,7 +12,12 @@ from .ihcdevice import IHCDevice
 from .util import async_pulse, async_set_bool
 
 
-def setup_platform(hass, config, add_entities, discovery_info=None):
+def setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    add_entities: AddEntitiesCallback,
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the IHC switch platform."""
     if discovery_info is None:
         return