Add in-app Ladill Queue integration for service queue consoles.

Settings toggle provisions Queue org via API; reception can call tickets from Frontdesk.

Co-authored-by: Cursor <cursoragent@cursor.com>

config/frontdesk.php

@@ -236,6 +236,12 @@ return [
         'lab' => 'Ladill Lab',
         'pos' => 'Ladill POS',
         'crm' => 'Ladill CRM',
+        'queue' => 'Ladill Queue',
+    ],
+
+    'queue' => [
+        'api_url' => env('QUEUE_API_URL', 'https://queue.ladill.com/api/v1'),
+        'api_key' => env('QUEUE_API_KEY_FRONTDESK'),
     ],
 
     'printers' => [