Modify response before sending to client

[mattamon]

Adding information to the response before sending it to the client to e.g. add infos from another bundle

[github-actions]

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.

[mattamon]

Resolved by #51

Adding additional attributes via traits to response schemes.
Adding specific events for every schema.

Also check https://pimcore.atlassian.net/wiki/spaces/PD/pages/4040982529/Studio+Backend+Blueprint for more info.