Add automagic-images plugin v1.1.1

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/automagic-images/adapters/interface.php

@@ -0,0 +1,15 @@
+<?php
+namespace Grav\Plugin;
+
+interface ResizeAdapterInterface
+{
+    public function __construct($source);
+
+    public function resize($width, $height);
+
+    public function getFormat();
+
+    public function setQuality($quality);
+
+    public function save($filename);
+}