[TASK] JSON scheme description for answer from AI service

[fenton512]

Description

To work with services independently, we need to invest scheme of JSON answer from AI service to the go service.

To do

• describe structure that contains cards with:
  • question for the card
  • n true variant (for simplicity we can start with one true)
  • m false variant (for simplicity we can start with 3 false)
  • hint for the user (for simplicity we can use mock value)

Acceptance Criteria

• we choose format for the card as a team