Automatically show description from interface

[olivernybroe]

When implementing an interface it would be nice to automatically see the description of that interface on the implementation.
This should only be shown if the implemented field does not have its own description.

This should be fairly simple when dealing with a single interface, the biggest problem is what to do when multiple interfaces has the same field with different descriptions. I would suggest as the first implementation of this to simply do nothing in that case or to take the first interface and use that.

[spawnia]

In order to be consistent and avoid ambiguity, I would always mark descriptions coming from an implemented interface explicitly as such. Here is a quick & dirty visual mockup I made:

[acao]

@sgrove from onegraph suggested this very idea years ago, I agree - it‘s a natural choice!

[olivernybroe]

At least currently this means we need to copy/paste descriptions from interfaces to implementation for making a better user experience, but with this, that would be unneeded 👀

[acao]

@olivernybroe this was also in @orta's original redesign from 2019/2020! There was resounding support for this then. There are forked versions of graphiql that do this as well.

We should target this for a 2.x version if not 2.0.0 itself. I would like to add it to the legacy DocExplorer as well, which will continue to be shipped from @graphiql/react

[acao]

@dotansimha @n1ru4l isn't this something y'all have implemented in your modular graphiql fork?