[Feature]: Add Genesys / FFG Starwars dice roller

[cwisniew]

Describe the Problem

The Narrative dice system used by FFG Starwars and many other Genesys games are not supported by MapTool and should be.

The Solution you'd like

Support the dice rollers above.

Alternatives that you've considered.

People have made macros to do these dice, but they are complicated.

Additional Context

No response

[kwvanderlinde]

Took this for a spin. As far as I can tell, results align with expectations, though an expert in the system would be better equipped to decide that. I also did not try out every possibility yet.

The PR claims that gs.lastRoll.light and gs.lastRoll.dark are not set when using gs! rolls. But I found these variables are set the just return 0. Otherwise the variables seem to be aligning with expectations, including that sw.* are only set when rolling with sw!, and gs.* are only set when rolling with gs!.