Write Dataverse API v2 proposal and share with community

[scolapasta]

We have the doc here:
Dataverse API v2

Need to complete, review, and share.

[johannes-darms]

Nice, when a new API is drafted please consider this RFC (https://datatracker.ietf.org/doc/html/rfc7807) and the matching implementation (https://github.com/zalando/problem) which I found quite handy in other projects.