docker-compose - dry-run - json output

[ITJamie]

Description

It would be great if the docker-compose dry-run outputs had a flag to output a json blob at the end of their run with the information about proposed changes (if any).

This would allow for easier wrapping with tooling eg ansible/salt/python-on-whales

gabrieldemarmiesse/python-on-whales#448

[felixfontein]

It would be great if machine-readable output (JSON streams?) could be enabled for all commands.

[felixfontein]

I created #11478 to implement a general JSON stream progress output. That should fix this.