Propagating entities (projects, deployments, API collections etc.) from environment to environment

Example:
User is in a DEV environment and is satisfied with his projects (and workflows). Now he wants to promote/propagate/(some better word?) them into PROD env. This is basically copying a project (and picked workflows) and pasting it into an another environment. Connections need to be manually recreated for them.

Complications arise in a case of API Collections and Datatables where if a user propagates a collection or a datatable and them wants to update it after a while he needs some way of automatically changing it and seeing the difference between versions.

Final result of this ticket should be a defined **user journey** through the app.

But before defining it, we should
- attach screenshots of existing UI
- thoroughly discuss this again
- pinpoint where a user will waste his time and energy the most
- show as much similar examples as possible