Added XenForo route system and custom menu render.

app/xenforo.php

@@ -0,0 +1,8 @@
+<?php
+
+if( !function_exists( 'xfRoute' ) ){
+
+    function xfRoute( string $routeName, array $arguments = [] ): string {
+        return app(\App\Services\XenforoService::class)->getRoute( $routeName, $arguments );
+    }
+}