message: Add tutorial for "Password Strength" challenge
diff: @@ -13,6 +13,7 @@ import { PrivacyPolicyInstruction } from './challenges/privacyPolicy'
  import { LoginJimInstruction } from './challenges/loginJim'
  import { ViewBasketInstruction } from './challenges/viewBasket'
  import { ForgedFeedbackInstruction } from './challenges/forgedFeedback'
  +import { PasswordStrengthInstruction } from './challenges/passwordStrength'
  const challengeInstructions: ChallengeInstruction[] = [
  ScoreBoardInstruction,
  @@ -21,7 +22,8 @@ const challengeInstructions: ChallengeInstruction[] = [
  DomXssInstruction,
  PrivacyPolicyInstruction,
  ViewBasketInstruction,
  - ForgedFeedbackInstruction
  + ForgedFeedbackInstruction,
  + PasswordStrengthInstruction
  ]
  export interface ChallengeInstruction {
  