feat(notification): implement email notifications for user registration and purchase events

app/Domains/Notification/Events/UserRegistered.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Domains\Notification\Events;
+
+use App\Domains\Auth\Models\User;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class UserRegistered
+{
+    use Dispatchable, SerializesModels;
+
+    public function __construct(
+        public readonly User $user,
+        public readonly string $tenantCode,
+    ) {}
+}