Detect incompatible Serverless Framework versions

[mnapoli]

Related to local fallback, we want to provide a good experience when the user has incompatible Serverless Framework versions installed.

The idea we want to do is:

• on the first deploy of a Framework service (via Compose), run serverless --version and check the version is supported
• if not, throw a clear error message
• if it is supported, cache that the check was successful in the state

There's a slight risk the user could downgrade later, but it's an edge case that we can reasonably ignore.