Feature Request: Allow Answer Options to also have value representations aside from labels

We currently try to cast the label of the AnswerOption to the type indicated. This becomes a bit problematic if there is a situation where the label is supposed to be a verbalization of an underlying numeric/ boolean score.

Example

questions:
  - datatype: int
    answers:
      - id: A001
        label: "Unlikely"
      - id: A002
        label: "Likely"
      - id: A003
        label: "Certain"

The suggestion would be to add in an optional key to indicate a value representation independently of the label if present.

questions:
  - datatype: int
    answers:
      - id: A001
        label: "Unlikely"
        value: 1
      - id: A002
        label: "Likely"
        value: 2
      - id: A003
        label: "Certain"
        value: 5

The value could be used for ordering, and allowing data types of AnswerOptions to be used independently from the label representation.