Copy feature to add wireguard proxy

[huuhaa]

Is your feature request related to a problem? Please describe.
This could solve issues like #61 and #141

Describe the solution you'd like
At ReThink DNS there's proxy option to setup wireguard connection to vpn, one can also use wireguard conf file to set up connection. I include screenshots for that feature:

I think it would be really nice if TrackerControl could "copy" this fuctionality. I'm not sure can code be re-used how easily, or with extremely huge work.. Also I'm not developer, so might be I spotted wrong pull reguest, if I did sorry for that. But following might be related to that function if I'm not mistaken:

celzero/rethink-app#903

If I understood correctly, that would make traffic going via vpn setted in wireguard conf file or other methods setted there + still keep TrackerControl doing it's main job, blocking trackers.

[kasnder]

Probably quite some work 😄