Network management UI: add system proxy default TUN Mode

[Pantyhose-X]

• System proxy: Wintun
  ligolo-ng
  wireguard TUN
  Universal TUN/TAP driver
  tun2socks
  tun2proxy
  https://www.kernel.org/doc/html/v6.1/networking/tuntap.html
  https://man.freebsd.org/cgi/man.cgi?query=tun
  Network management UI added option TUN
  TUN acts as an agent for existing agreements, HTTP proxy HTTPS proxy SOCKS proxy
  Use TUN mode to proxy all traffic throughout the system, including terminals

Why this request?

I’m in a country where the internet is very blocked, and upgrading OS or downloading software is a hassle, github gitlab Ping over time 300ms.

In thousands of Linux and BSD distributions, there is no single system desktop environment that proxies all traffic,
I use a proxychains and it’s a terrible proxy for the terminal, very slow.

[llenotre]

Hi,
I may look at this one day, but for now the OS does not even have network support yet. So I need to implement it first