[Feature] add roll tables for critical hit and critical fumble effects

It would be nice to have roll tables for critical hit and fumble effect as offered in the game mastery card decks.

Critical fumble

  • melee attack
  • range attack
  • natural weapon
  • spell failure

Critical hit

  • piercing weapon
  • slash weapon
  • bludgeoning weapon
  • magic
Edited by McGreger