Add DDD classes for Mastodon\Field entity

src/Collection/Api/Mastodon/Fields.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Friendica\Collection\Api\Mastodon;
+
+use Friendica\Api\Entity\Mastodon\Field;
+use Friendica\BaseCollection;
+
+class Fields extends BaseCollection
+{
+	/**
+	 * @param Field[]  $entities
+	 * @param int|null $totalCount
+	 */
+	public function __construct(array $entities = [], int $totalCount = null)
+	{
+		parent::__construct($entities);
+
+		$this->totalCount = $totalCount ?? count($entities);
+	}
+}