Implement bundled courses/lessons

See AlekSIS-App-Lesrooster#25 (closed) This is the Cursus-Part of this issue.

changed milestone to /AlekSIS%"[NLnet #1 (closed)] Implement bundled courses/lessons"

added source::customer::kath type::feature labels

assigned to @permcu

created branch 22-implement-bundled-courses-lessons to address this issue

mentioned in merge request !49 (merged)

closed with commit fb87b08d

mentioned in commit fb87b08d