Better Thin Client/Netbook Support: UWP + Windows.Networking.Vpn

### Issue Details

1 of my devices is a thin client/netbook/whatever they call a "PC w/ very few resources" this decade. I haven't run even AdGuard Windows full client on this device (thought I've available license slots), due to wanting to preserve those resources, but am relying on OS-configured subscription AGDNS + the AG browser extension. So the AGVPN client is comparatively quite a heavy always-on app.

### Proposed solution

I'd like a way to access subscription AGVPN through Windows' own Networking VPN settings, since that's already integrated into the OS.

_N.B.: I searched these issues looking for a similar request. If such exists, please feel free to close w/ a link to that._

### Alternative solution

Maybe just the AGVPN extension? But that leaks everything outside the browser.

In place of original AG, AGDNS + browser extension plugs mostly everything for what I use. I'm looking for a VPN equivalent for that.