Move AHB Models to KohlrAHBi

[DeltaDaniel]

In order to maintain the logic of our "food chain," it would make sense to move the classes comprising the AHB Data Models to the KohlrAHBi library. At this point, we could also use pydantic classes. As far as I can see, this would affect the following classes:
AHBLine and AHBLineSchema.