`compose ps --format=json` not implemented

**Is your feature request related to a problem? Please describe.**
`docker compose ps --format=json | jq` uses in scripting not easily replaceable with podman-compose, which doesn't support the format arg.

**Describe the solution you'd like**
Implementation of `ps --format=json`.

**Describe alternatives you've considered**
Alternative really is just not having it, as is the status quo. I think it would be useful though, certainly it prevents me using podman at work.

**Additional context**
Willing to contribute.