This commit fixes the nthread parsing in the whisper.wasm example when
using the `Threads` slider to change the number of threads to be used.
Currently this results in the following error:
```console
main.js:5597 Uncaught TypeError: Cannot convert "5" to int
at checkAssertions (main.js:5597:21)
at Object.toWireType (main.js:5611:15)
at Object.full_default (eval at new_ (main.js:5292:27), <anonymous>:10:26)
at whisper.wasm/:649:42
```
* npm : preparing infra for node package
* npm : package infra ready
* npm : initial version ready
* npm : change name to whisper.cpp
whisper.js is taken
Same as the command-line tool "command", but runs in the browser
Also, added helper script "extra/deploy-wasm.sh" and fixed some timing
constants for the WASM examples.