Add basic type hints to ads (#62738)

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

homeassistant/components/ads/switch.py

@@ -1,9 +1,14 @@
 """Support for ADS switch platform."""
+from __future__ import annotations
+
 import voluptuous as vol
 
 from homeassistant.components.switch import PLATFORM_SCHEMA, SwitchEntity
 from homeassistant.const import CONF_NAME
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 from . import CONF_ADS_VAR, DATA_ADS, STATE_KEY_STATE, AdsEntity
 
@@ -17,7 +22,12 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
 )
 
 
-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 switch platform for ADS."""
     ads_hub = hass.data.get(DATA_ADS)