Add base code to support retrieving allocations as a client

app/Transformers/Api/Client/AllocationTransformer.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Pterodactyl\Transformers\Api\Client;
+
+use Pterodactyl\Models\Allocation;
+
+class AllocationTransformer extends BaseClientTransformer
+{
+    /**
+     * Return the resource name for the JSONAPI output.
+     *
+     * @return string
+     */
+    public function getResourceName(): string
+    {
+        return 'allocation';
+    }
+
+    /**
+     * Return basic information about the currently logged in user.
+     *
+     * @param \Pterodactyl\Models\Allocation $model
+     * @return array
+     */
+    public function transform(Allocation $model)
+    {
+        $model->loadMissing('server');
+
+        return [
+            'ip' => $model->ip,
+            'alias' => $model->ip_alias,
+            'port' => $model->port,
+            'default' => $model->getRelation('server')->allocation_id === $model->id,
+        ];
+    }
+}