Support every output format for the bb graph (agf) #10030
Now agf supports the following outputs:
Note: this pr doesn't break any existing commands. It only adds new ones.
Also, I know nested switches are ugly, but I prefer to do code polishing when I'm done with the other types of graphs (agg, agc...) so that I can see better which parts of the code can be generalized.
But please if you have an idea on how this could be improved / written more elegantly don't hesistate to tell me.