introduce --watch

[ndeloof]

What I did This introduces a new --watch flag to docker compose up so watch feature can be enabled on up, with all the logs attachement features. Watch events are reported mixed with application logs, but use of a reserved log stream name allows to offer a distinguished rendering

demo: https://asciinema.org/a/S3I2cyLUa0xomePNACgvo75Cg

Long term, I expect this also to allow dynamically enabling watch mode on a running up command.

Related issue fixes https://github.com/docker/compose/issues/11089

(not mandatory) A picture of a cute animal, if possible in relation to what you did