Feat/did key

[eike-hass]

Description of change

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Type of change

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• Bug fix (a non-breaking change which fixes an issue)
• Enhancement (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Fix

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Change checklist

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• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[UMR1352]

@eike-hass what do we want to do with this? The implementation only supports a portion of the did:key specification and has not been thoroughly documented nor tested

[eike-hass]

@eike-hass what do we want to do with this? The implementation only supports a portion of the did:key specification and has not been thoroughly documented nor tested

we need did:key support for Selv and might need to extend to did:jwk es well. I think we should be okay with only considering ed25519 support for now though and rethink for 2.0.
Long story short: We should try to get this in an acceptable state and merge mid-term.