Removed encore added books crud

src/Twig/AppExtension.php

@@ -0,0 +1,22 @@
+<?php
+
+
+namespace App\Twig;
+
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class AppExtension extends AbstractExtension
+{
+    public function getFunctions()
+    {
+        return [
+            new TwigFunction('file_exists', [$this, 'file_exists']),
+        ];
+    }
+
+    public function file_exists(string $file): bool
+    {
+        return file_exists(ltrim($file, '/'));
+    }
+}