Add recommendation to results about klippain-shaketune HOT 1 OPEN

Hello,

I left this a bit on the side to work on the main features first. But now that I'm mostly done, I'm taking a closer look at the feature request.

So this is pretty easy to do, but I have some concerns about giving a direct recommendation to tighten A or B belt: since the tension is measured in relative terms, one belt to the other, it's pretty hard to know if it's really B that needs to be tightened, or the opposite A that needs to be loosened. The problem with this is that if there are other problems on the belt path, or if the base tension is already pretty off, you could end up with way too much tension, which could create VFAs, or worse, break printer parts or bend the motor shafts. So I prefer to let the user decide what to do with the information provided.

By the way, to remember which belt is on which side, think of a sheep: BBBAAAAAAA -> B is left, A is right!
I could add a note about this in the documentation and maybe on the graph :)

from klippain-shaketune.