Retrieve study descriptors from oeo instead of a static list

[jh-RLI]

Description of the issue

After #1507 it became clear that we can currently only implement a static list that identifies classes from the oeo as study descriptors for the scenario bundles in the OEKG. As @l-emele described, an annotation could be implemented in the oeo that specifies descriptors.

Ideas of solution

Retrive all study descriptors from oeo based on the "descriptor" annotation.

Workflow checklist

• I am aware of the workflow in CONTRIBUTING.md

[stap-m]

I created a PR with a new annotation and added the annotation to all classes that we wanted as study descriptors so far, see OpenEnergyPlatform/oekg#19.

[stap-m]

The annotations are merged into the oeo dev-branch now. The next release to main is planned for Oct 1st. Can you work with the dev branch as well or should we schedule an extra release, if we want to have it for SIROP?

[jh-RLI]

Great :) I can work with the oeo-dev branch. We mainly use the oeo-full.owl file in the OEP. I assume it is generated for each oeo release version?