workflow: Add a new workflow for ontology file clean up

[anatheka]

We want to add a new workflow, that sorts the Ontology files and removes unused declarations (???).

For that we can use the following two commands:

• Sort the declarations, axioms, ...: robot convert --input security.owx --format owx --output security-new.owx
• Make a diff to check if something is removed: robot diff --left security.owx --right security-new.owx --output security-diff.txt -> results in best case in Ontologies are identical