Simplify effect configuration

[beckydvn]

Right now, the default action configuration is a bit cluttered. Take this action from bank_bot:

  offer-pay:
    type: dialogue
    message_variants:
      - Would you like to pay off your outstanding bills today?
      - You have a few outstanding bills. Would you like to pay them off now?
    condition:
      tried-pay-bills:
        value: false
      task:
        known: false
    effect:
      start-task:
        oneof:
          outcomes:
            want-pay:
              updates:
                task:
                  known: true
                  value: pay bills
              intent: confirm
            dont-want:
              updates:
                tried-pay-bills:
                  value: true
              intent: deny
              response_variants:
                - Ok! I won't pay off your outstanding bills today.

Mainly the effect configuration could be simplified by removing the "oneof" and "outcomes" labels, which are the same every time:

  offer-pay:
    type: dialogue
    message_variants:
      - Would you like to pay off your outstanding bills today?
      - You have a few outstanding bills. Would you like to pay them off now?
    condition:
      tried-pay-bills:
        value: false
      task:
        known: false
    effect:
      start-task:
        want-pay:
          updates:
            task:
              known: true
              value: pay bills
          intent: confirm
        dont-want:
          updates:
            tried-pay-bills:
              value: true
          intent: deny
          response_variants:
            - Ok! I won't pay off your outstanding bills today.

This combined with #15 could make an even simpler configuration:

  offer-pay:
    type: dialogue
    message_variants:
      - Would you like to pay off your outstanding bills today?
      - You have a few outstanding bills. Would you like to pay them off now?
    condition:
      tried-pay-bills:
        value: false
      task:
        known: false
    effect:
      start-task:
        want-pay:
          updates:
            task:
              value: pay bills
          intent: confirm
        dont-want:
          updates:
            tried-pay-bills:
              value: true
          intent: deny
          response_variants:
            - Ok! I won't pay off your outstanding bills today.