[Improvement]: JSON encoder/decoder operator

[xfynx]

Improvement description

Hello everyone! Didn't find nothing similar to it.

Is it possible to add json encoder/decoder operator for data-hub graphql configuration similar to grid view's one? We encountered a need for which it would be very useful (converting a string-json-like textarea to another object segment in graphql output).

[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.