Document API of machine readable command line output

[mink99]

Describe the request

The JSON Output, structure and semantics are not really documented, changes in the output of the various commands will break applications that rely on parsing this output.
Without a fully documented JSON and a dedicated changelog, currenty the creation/update of parsers (in c++) relies on creating samples of various output, running them through quicktype (https://app.quicktype.io/) and merging the results (and praying that there were sufficient samples).

So I would ask to provide proper and full documentation and changelogs for the various json outputs.

Describe the current behavior

The JSON Output of various commands , structure and semantics are not really documented, changes in the output of the various commands will break applications that rely on parsing this output.

Arduino CLI version

all

Operating system

Windows

Operating system version

10,11

Additional context

No response

Issue checklist

• I searched for previous requests in the issue tracker
• I verified the feature was still missing when using the nightly build
• My request contains all necessary details