Add EnergiemengeErweitert

The model EnergiemengeErweitert hav to be add to the intermediate layer.
```
class EnergiemengeErweitert(Energiemenge):
"""
This class models the bo Energiemenge as used in the intremediate layer.
This model is based on the bo4e object Energiemenge, but uses the non-standard compoment VerbrauchErweitert
instead of the official component Verbrauch.
We need this class for the serialization of the targetmodel QuantityBoneycomb, because otherwise the additional
fields of Verbraucherweitert will be missing after serilization.
"""
energieverbrauch: list[VerbrauchErweitert] # type: ignore[assignment]
```