List WhatsApp contacts

curl --request GET \
  --url https://app.kapso.ai/api/v1/whatsapp_contacts \
  --header 'X-API-Key: <api-key>'

{
  "data": [
    {
      "id": "contact-789ghi",
      "wa_id": "1234567890",
      "profile_name": "John Doe",
      "metadata": {},
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ],
  "meta": "<any>"
}