Network management UI: add system proxy default TUN Mode

[Pantyhose-X]

Describe the feature or enhancement

• Network management UI: System proxy: TUN Mode Wintun
  ligolo-ng
  wireguard TUN
  Universal TUN/TAP driver
  tun2socks
  tun2proxy

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 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.

[probonopd]

Thanks for suggesting to add an easy way to tunnel/proxy all traffic.

We would probably need to write a small GUI tool (in PyQt5) to configure it.