Updated pyavl and pyavlunicado

Description

For the flight_mechanics assessment, two new libraries where introduced: pyavl and pyavlunicado. These libraries need some updates to work with the current flight_mechanics from the assessment repo.

Other Changes

• Added pyavl and pyavlpackage to CMakeLists, so they are installed as well.

Testing Instructions

1. Download this branch.
2. If the libraries should be manually installed, they can be installed using "pip install ." inside the folder pyavlpackage and pyavlunicadopackage. When building the installer, they should be automatically installed.
3. Check with the flight_mechanics assessment, if everything works fine together: https://git.rwth-aachen.de/unicado/assessment/-/tree/feature/flight_mechanic_assessment?ref_type=heads

Developer Checklist

• Code has been tested locally and/or in pipeline.
• Merge conflicts resolved with the target branch.