Get shipment pick up date proposal.

Example response

{
  "pickups": [
    {
      "pickupDate": [
        {
          "pickupId": "no_pickup"
        },
        {
          "pickupId": "working_days"
        },
        {
          "pickupId": "2024-06-12|09:00|18:00"
        },
        {
          "pickupId": "2023071210001300"
        }
      ]
    }
  ]
}