WireGuard proxy: Refactor (#6287)

And https://github.com/XTLS/Xray-core/pull/6303#issuecomment-4669158076

Fixes https://github.com/XTLS/Xray-core/issues/6257

proxy/wireguard/tun_default.go

@@ -1,14 +1,16 @@
-//go:build !linux || android
+//go:build !linux
 
 package wireguard
 
 import (
 	"errors"
 	"net/netip"
+
+	"golang.zx2c4.com/wireguard/tun"
 )
 
-func createKernelTun(localAddresses []netip.Addr, mtu int, handler promiscuousModeHandler) (t Tunnel, err error) {
-	return nil, errors.New("not implemented")
+func createKernelTun([]netip.Addr, []netip.Addr, int) (tdev tun.Device, tnet *Net, err error) {
+	return nil, nil, errors.New("not implemented")
 }
 
 func KernelTunSupported() (bool, error) {