This makes it possible to send wsh commands from wsh on a remote session
to wavesrv running locally. The exact behavior of running those commands
isn't implemented, but the underlying interface is added here.
This enables basic ssh for connections using publickey auth without a
passphrase. It can be established by creating a widget with the "meta"
property set to
```
{
"connection": "<user>@<host>:<port>"
}
```
where the :<port> is optional.
---------
Co-authored-by: sawka <mike.sawka@gmail.com>
