chore: sync module from working instance and add install guide

events/AnimalTileSizeEvent.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace humhub\modules\animal_management\events;
+
+use humhub\modules\animal_management\models\Animal;
+use humhub\modules\content\components\ContentContainerActiveRecord;
+use yii\base\Event;
+
+class AnimalTileSizeEvent extends Event
+{
+    public const EVENT_RESOLVE_SIZE = 'resolveSize';
+
+    public Animal $animal;
+    public ContentContainerActiveRecord $contentContainer;
+    public $existingDonationGoal = null;
+
+    private int $additionalHeightPx = 0;
+
+    public function addAdditionalHeightPx(int $heightPx): void
+    {
+        if ($heightPx <= 0) {
+            return;
+        }
+
+        $this->additionalHeightPx += $heightPx;
+    }
+
+    public function getAdditionalHeightPx(): int
+    {
+        return max(0, $this->additionalHeightPx);
+    }
+}