bug#47645: Feature Request: Add Simple Firewall by default

[bo0od]

Hi There,

It would be nice too see simple FW within Guix, Most common one used in 
GNU distros is Gufw used in ubuntu,mint..etc

This is essential for end users to have control on opening/closing ports 
and/or control on income/outcome traffics.. by using either GUI or 
simple CLI commands. (iptables is for surely not simple)

ThX!