Add --copy-annotation option to ontoconvert

[jesper-friis]

Description

This option is needed to automatically rdfs:label annotations to classes and properties when publishing EMMO to increase the FAIRness or the ontology.

Type of change

• [ ] Bug fix.
• [x] New feature.
• [ ] Documentation update.
• [ ] Test update.

Checklist

This checklist can be used as a help for the reviewer.

• [ ] Is the code easy to read and understand?
• [ ] Are comments for humans to read, not computers to disregard?
• [ ] Does a new feature has an accompanying new test (in the CI or unit testing schemes)?
• [ ] Has the documentation been updated as necessary?
• [ ] Does this close the issue?
• [ ] Is the change limited to the issue?
• [ ] Are errors handled for all outcomes?
• [ ] Does the new feature provide new restrictions on dependencies, and if so is this documented?

Comments

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.88889% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 72.21%. Comparing base (91c20c5) to head (4ea6ce8).

Files	Patch %	Lines
ontopy/utils.py	88.88%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #732 +/- ## ========================================== + Coverage 72.12% 72.21% +0.08% ========================================== Files 17 17 Lines 3444 3462 +18 ========================================== + Hits 2484 2500 +16 - Misses 960 962 +2 ```

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