message: add orc to racename
diff: import { ThresholdTable } from '../src/rollFromTable'
  import { dice } from '../src/dice'
  -export type RaceName = 'dragonborn' | 'dwarf' | 'elf' | 'gnome' | 'half-elf' | 'halfling' | 'half-orc' | 'human' | 'tiefling' | 'goblin'
  +export type RaceName = 'dragonborn' | 'dwarf' | 'elf' | 'gnome' | 'half-elf' | 'halfling' | 'half-orc' | 'human' | 'tiefling' | 'goblin' | 'orc'
  interface RaceTrait {
  probability: number
  