76-copy-an-already-existing-ecmr

Related issues

#76 (closed)

Acceptance criteria

• Implemented code changes don't diverge from the related issue.
• Documentation reflects the status quo after merge.
• Version number is incremented according to SemVer. (Snapshot versions are not merged/released.)
• Only released versions of dependencies are used (i.e. no snapshot versions).
• Pipeline still works.
• GitLab issue is up-to-date.

If necessary, the following sections have been updated:

• Swagger
• Readme.md
• Documentation

Proposed squash commit message

Added functionality to copy an ecmr.

Frontend:
- Added copy button to overview
- Added new routing path
- Added filter to exclude specific fields that are not supposed
  to be copied
- Added functionality to copy an ecmr by creating a new one based of 
  the values from the source

Closes #76 (closed)