ASR engines compatible list

Hi @amigniter,
Thanks for your work and contribute a great module for opensource communities.
From my experience, I confirm this module work well with [VOSK](https://alphacephei.com/vosk/).

Could you please list some ASR engines already work with this module?  such as :

- [ ] IBM Watson
- [ ] AWS  Transcribe
- [ ] Azure Transcribe
- [ ] OpenAI Transcribe 

