[safety-reporting] Build an exporter for safety cases

- Based on the exporter for the component architecture

(from redmine: issue id 2679, created on 2016-08-27, closed on 2020-08-10)

• Relations:
  • relates #3712
  • child #3632 (closed)
  • child #3634 (closed)
  • child #3699 (closed)
  • child #3751 (closed)
  • parent #3786 (closed)