feat: intercept and forward to our own destination

[daiyam]

This PR allows to intercept and to forward to our own destination.

It has been used in production in the project https://github.com/jeanp413/open-remote-ssh/ (since 2022)

With

server = createSocksServer({
    connectionFilter: (destination: SocksConnectionInfo, origin: SocksConnectionInfo, callback: (err?: unknown, dest?: stream.Duplex) => void) => {
        this.connect().then(() => {
            this.sshConnection!.forwardOut(
                origin.address,
                origin.port,
                destination.address,
                destination.port,
                (err, stream) => {
                    if (err) {
                        this.emit(SSHConstants.CHANNEL.TUNNEL, SSHConstants.STATUS.DISCONNECT, { SSHTunnelConfig: SSHTunnelConfig, err: err });
                        return callback(err);
                    }
                    return callback(null, stream);
                });
        });
    }
}).on('proxyError', (err: unknown) => {
    this.emit(SSHConstants.CHANNEL.TUNNEL, SSHConstants.STATUS.DISCONNECT, { SSHTunnelConfig: SSHTunnelConfig, err: err });
});

at https://github.com/jeanp413/open-remote-ssh/blob/master/src/ssh/sshConnection.ts#L272

I've just become a maintainer of that project and want to contribute it back to your project.