Expose the abstract Battery class as part of the public interface

Signed-off-by: Sahas Subramanian <[email protected]>

Author: shsms

src/frequenz/client/assets/electrical_component/__init__.py

@@ -4,6 +4,7 @@
 """Electrical component types."""
 
 from ._battery import (
+    Battery,
     BatteryType,
     LiIonBattery,
     NaIonBattery,
@@ -53,6 +54,7 @@
 __all__ = [
     "Chp",
     "CryptoMiner",
+    "Battery",
     "BatteryType",
     "LiIonBattery",
     "NaIonBattery",