List Voices

const voices = await suonora.voices.list();
console.log('Available voices:', voices);

{
  "success": true,
  "data": [
    {
      "id": "axel",
      "name": "Axel",
      "gender": "male",
      "language": "en-US",
      "preview_url": "https://api.suonora.com/v1/voices/axel/preview"
    }
  ]
}