seo : fix sitemap empty in prod, set canonical base to world.game

- Add config.world.game.php with debug=false so robots.index=true in prod
- Fix canonical.base to https://world.game

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

site/config/config.php

@@ -18,7 +18,7 @@ return [
 
     'tobimori.seo' => [
         'canonical' => [
-            'base' => 'https://www.worldgame.fr',
+            'base' => 'https://world.game',
         ],
         'sitemap' => [
             'enabled' => true,

site/config/config.world.game.php

@@ -0,0 +1,5 @@
+<?php
+
+return [
+    'debug' => false,
+];