Smart tab jump limit

[PerpetualCreativity]

I've noticed that #7804 and also accidentally hitting tab inside a top-level comment is kind of annoying.

I think it might be useful to add an option to limit the number of lines that smart tab will jump, i.e. set smart-tab.jump-limit 40
will prevent the smart tab from jumping to the end of the parent node if it's more than 40 lines away.

If this sounds like a good idea, I'll try implementing it and open a PR.