Add a quality snapshot setting

[tzi]

Allow to snap the current quality (number of errors) of each component.

So having an error would not block the lint, but having more error than the last check would.

This feature would allow to have a good view of the code base quality (instead of the current block blacklist) and to easy continuous improvment (fix an error instead of an entire block).

Who's in?

[fdubost]

I'm in 👍 ❤️