tun: set dns on windows

Signed-off-by: Mark Pashmfouroush <[email protected]>

app/tun_windows.go

@@ -96,6 +96,11 @@ tryAgain6:
 		return nil, fmt.Errorf("unable to set metric and MTU: %w", err)
 	}
 
+	err = luid.SetDNS(family4, []netip.Addr{netip.MustParseAddr("1.1.1.1")}, nil)
+	if err != nil {
+		return nil, fmt.Errorf("unable to set DNS: %w", err)
+	}
+
 	return tunDev, nil
 
 }