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

app/Domains/Notification/Events/TicketsAvailable.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Domains\Notification\Events;
+
+use App\Domains\Purchase\Models\Purchase;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class TicketsAvailable
+{
+    use Dispatchable, SerializesModels;
+
+    /**
+     * @param  array<int, int>  $ticketIds
+     */
+    public function __construct(
+        public readonly Purchase $purchase,
+        public readonly array $ticketIds,
+    ) {}
+}