Implement Call of Cthulhu dice rolling

[ProjectMoon]

Once we find out the rules for it.

[Zoinker]

Regular skill/characteristic roll:

• Roll 1d100 (1d% + 1d10)
• argument: Skill/characteristic value
• results:
  • Roll > value: Failure
  • Roll >= 96 | value < 50 OR Roll = 100: Fumble
  • Roll <= value: Success
  • Roll <= value/2: Hard Success (fractions rounded down)
  • Roll <= value/5: Extreme Success (--''--)
  • Roll = 1: Critical Success
• Bonus die: roll 1 or 2 extra d%, pick one that yields lowest value
• Penalty die: roll 1 or 2 extra d%, pick one that yields highest value

Advancement roll: (For increasing skills)

• Roll 1d100 (1d% + 1d10)
• Argument: Skill value (characteristics or luck in some cases)
• Results:
  • Roll <= value: Failure
  • Roll > value OR Roll > 95: Success. Roll 1d10 and add it to your skill.

EDIT: Corrected how bonus/penalty die work and the >95 threshold for advancement rolls