Support Zenodo & OSF DOI Links for metadata retrieval / import to the metadata form fron an external repositories `codecheck.yml`

[dxL1nus]

See #75

• Zenodo import is already possible, so now import from Zenodo via a DOI should be possible as well
• OSF import is already possible, so now import from OSF via a DOI should be possible as well

[dxL1nus]

This is now possible. DOI's are supported with and without https://doi.org/ as a prefix.

Supported DOI formats: