Support Python bodies for "short block"

[pokey]

It would be nice if in the following:

def aaa():
    bbb;
    ccc;

    ddd;

Saying "short block bat" referred to

    bbb;
    ccc;

We could probably do it by creating a version of SurroundingPairInteriorScopeHandler that looks not just for surrounding pair interiors but also interiors of any tree-sitter scopes that have an interior

Although there is a case to be made that what "short block" really wants to be looking at is indentation level 🤔. Would be a very different impl than what we just made tho I think 😅

[AndreasArvidsson]

That example sounds useful.
Using indentation is in many ways simpler than what we are currently doing :D