[REQUEST] ONNX/JS-compatible export for client-side TTS

[arvigeus]

I’m currently using Xenova/mms-tts-vie with [Transformers.js](https://github.com/xenova/transformers.js) in a browser environment, which runs fully client-side via ONNX/WebAssembly. I’d love to try VieNeu-TTS in the same setup.

Problem:

VieNeu-TTS relies on eSpeak NG, which isn’t compatible with the browser env, so I can’t run it client-side right now.