Better AST Debug Print

Improve the output of ASTPrint. It should at minimum, display all the information it currently displays,
and it should in addition to that, display the AST in a way which shows the nesting levels with
indentation at minimum. At best it should also use lines to draw the parent child connections,
but that is optional.

Update:
Currently the AST now prints with indentation based on nesting, future improvements should explicitly draw connections