* [Whisper] Update to use quantized model
* [whisper] add language detection
* [whisper] change assets location
* [whisper] adapt js example with quantized models
* [whisper] better task parsing
* [whisper] minor fixes
- Add ms/token on llama2.c (15ms/token on my personal machine)
- Hide `Run` buttons while models are not ready
- Add dummy `progress` while weights are downloading (I briefly looked
at putting a real progressbar.. and nothing easy enough came up.)
