chore(all): make code compilable for other platforms than Linux

internal/wireguard/wireguard_linux.go

@@ -0,0 +1,16 @@
+package wireguard
+
+import (
+	"net"
+	"os"
+
+	"golang.zx2c4.com/wireguard/ipc"
+)
+
+func uapiOpen(name string) (*os.File, error) {
+	return ipc.UAPIOpen(name)
+}
+
+func uapiListen(interfaceName string, uapiFile *os.File) (net.Listener, error) {
+	return ipc.UAPIListen(interfaceName, uapiFile)
+}