Implement creator studio and upload updates

app/Services/Sitemaps/SitemapBuilder.php

@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Services\Sitemaps;
+
+use DateTimeInterface;
+
+interface SitemapBuilder
+{
+    public function name(): string;
+
+    /**
+     * @return list<SitemapUrl>
+     */
+    public function items(): array;
+
+    public function lastModified(): ?DateTimeInterface;
+}