Added a StructuralProbe
Added a StructuralProbe

The goal of this structural probe is to record information of the programs loaded.

At the moment, it contains information about classes, methods, slots, and variables.

Signed-off-by: Stefan Marr <46f1a0bd5592a2f9244ca321b129902a06b53e03@stefan-marr.de>

SOM-st/black-diamonds,SOM-st/black-diamonds