Energyzero - Add sensor entity to pick best hours (#98916)

* Add entity to pick best hours

* Add entity also to diagnostics

* Remove string translation that doesn't exists

---------

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

homeassistant/components/energyzero/sensor.py

@@ -13,7 +13,13 @@ from homeassistant.components.sensor import (
     SensorStateClass,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import CURRENCY_EURO, PERCENTAGE, UnitOfEnergy, UnitOfVolume
+from homeassistant.const import (
+    CURRENCY_EURO,
+    PERCENTAGE,
+    UnitOfEnergy,
+    UnitOfTime,
+    UnitOfVolume,
+)
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.device_registry import DeviceEntryType, DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -114,6 +120,14 @@ SENSORS: tuple[EnergyZeroSensorEntityDescription, ...] = (
         icon="mdi:percent",
         value_fn=lambda data: data.energy_today.pct_of_max_price,
     ),
+    EnergyZeroSensorEntityDescription(
+        key="hours_priced_equal_or_lower",
+        translation_key="hours_priced_equal_or_lower",
+        service_type="today_energy",
+        native_unit_of_measurement=UnitOfTime.HOURS,
+        icon="mdi:clock",
+        value_fn=lambda data: data.energy_today.hours_priced_equal_or_lower,
+    ),
 )