An option to make provide machine readable output from each command

[romanowski]

We have some options (--classpath) or commands (version) that has machine-readable output. The idea is to provide an option similar to how --porcelain in git works or mill by default.

Generally, the output should probably use JSON or other easy to parse format that can be easily derived from case cases or primitives.

[romanowski]

An interesting read about do and don't of JSON outputs (thanks @alexarchambault for the link)