Add a read-only Google AdSense analytics module for admins.

Connect AdSense over OAuth, sync entities and daily reports locally, and show placement performance in the admin panel without calling the Management API from public pages.

app/Services/Adsense/Exceptions/AdsenseException.php

@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Adsense\Exceptions;
+
+use RuntimeException;
+
+class AdsenseException extends RuntimeException {}