Add price options

curl -X POST "https://api.live.paisr.tech/v2/plans/{plan_id}/options" \
  -H "Authorization: Bearer <access_token>" \
  -H "User-Agent: MyApp/1.0" \
  -H "Content-Type: application/json" \
  -d '{
  "options": [
    {
      "description": "string",
      "unit_price": 0.01,
      "billing_interval": 1,
      "attributes": {}
    }
  ]
}'

{
  "success": true,
  "message": "Request was successful."
}