[Feature Request] Provide an error or warning if python version is incompatible.

[zapta]

Something along these lines:

• Add to distribution.json a specification of required python version.
• On each invocation of apio, either issue a warning or a fatal error if python version is incmpatible.
• If issuing just a warning, add to 'apio system info' some indication of the python compatibility status.

The goal is to flag any use of incompatible or non supported python version. The list of supported python version is available in tox.ini (currently 3.9/10/11/12/13).