RFC: Implement relay server specification

[rubanooo]

At the moment the relay server specification is only partly implemented. The full specification would be very useful when building apps with pagination and caching.

The webonyx documentation mentions this module: https://github.com/ivome/graphql-relay-php to fairly easily implement this feature.

[weisswurstkanone]

@rubanooo a PR would be warmly appreciated

[github-actions[bot]]

Thanks a lot for reporting the issue. We did not consider the issue as "Pimcore:Priority", "Pimcore:ToDo" or "Pimcore:Backlog", so we're not going to work on that anytime soon. Please create a pull request to fix the issue if this is a bug report. We'll then review it as quickly as possible. If you're interested in contributing a feature, please contact us first here before creating a pull request. We'll then decide whether we'd accept it or not. Thanks for your understanding.