Offline/client-side GitHub Release metadata validator

[slint]

Users have a lot of trouble validating their CITATION.cff or .zenodo.json files before enabling the GitHub integration for their repositories and pushing releases to Zenodo. Given that the validations are based on JSONSchemas, we could provide a simple interface that:

• Performs a client-side validation of the CITATION.cff
• Optionally, spits out what metadata we would parse on Zenodo (this would be much easier on our backend though, since we could just pass the file through our marshmallow schema).

[RichardJActon]

Is it documented somewhere what zenodo uses parse CITATION.cff so I can set something up to so this? I've just run into a case where my CITATION.cff is valid according to cffinit but the github integration is throwing an error which just says 'Citation metadata load failed' which is not useful for debugging and the prospect of tweaking the cff file and making new releases on github until it works is not a very appealing one.