List webhooks

curl -X GET "https://api.live.paisr.tech/v2/webhooks" \
  -H "Authorization: Bearer <access_token>" \
  -H "User-Agent: MyApp/1.0" \
  -H "Content-Type: application/json"

{
  "success": true,
  "data": {
    "webhooks": [
      {
        "id": "whk_123456",
        "description": "Checkout Callback",
        "endpoint": "https://api.example.com/callback",
        "paused": false,
        "triggers": [
          {
            "id": "wtr_12345",
            "type": "invoice.paid"
          }
        ],
        "created_at": "2024-01-15T10:30:00Z",
        "created_by": "tem_123456"
      }
    ]
  }
}