Add new heat pump model variants

[jfreissmann]

Description of task

Since there are a lot of components in a heat pump, there are a lot of ways to arrange them. The gist of this task is to add more combinations of the exisiting component pool.

Necessary steps

• Conceive interesting heat pump topology setup
• Create child class of HeatPumpBase that implements said setup
• Implement all relevant methods in alignment with the existing classes
• Create corresponding input parameter file
• Create topologie flow sheet as .svg file for light and dark mode
• Add the class to the hp_models dictionairy of variables.py