bug#68824: treesitter support for outline-minor-mode

[Juri Linkov]

> Instead of using treesit-search-forward, can you use
> treesit-beginning-of-thing or treesit--navigate-thing to do what you
> want? They handle the “child before parent” problem for you, and
> handles some other edge cases.

I don't understand yet how this would change the traversal order
from post-order to pre-order.  But I will try to use
treesit-beginning-of-thing and treesit--navigate-thing
Thanks for suggestion.

Eli, currently I don't need documentation
since I will check source code anyway.
But I agree this should documented at some time.