List payment links

curl --request GET \
  --url https://api.shoppex.io/dev/v1/payment-links \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "payment_links": [
      {
        "uniqid": "plink_1",
        "name": "Spring sale",
        "is_active": true,
        "show_confirmation_page": false,
        "url": "https://checkout.shoppex.io/pay/plink_1"
      }
    ],
    "total": 1,
    "stats": {
      "total": 1,
      "active": 1,
      "inactive": 0
    }
  }
}