Add a way to read passwords

[Asmod4n]

Would be cool if linenoise could disable echoing etc so passwords aren't written to the ternimal.

[OlliV]

Reading passwords securely requires more than that. Usually you want to ensure no one else is reading the input and that you are really connected to a terminal etc.

[Asmod4n]

The macOS Terminal has a special mode for that.
The bundled read -s (from bash or zsh) displays a "lock" icon. Same goes for getpass from unistd.h.

But when i copy that code the icon doesn't get displayed :/