add Moderation.php (#14)

Co-authored-by: bastien <bastien.ollier1@gmail.com>
Co-authored-by: clfreville2 <clement.freville2@etu.uca.fr>
Reviewed-on: https://codefirst.iut.uca.fr/git/clement.freville2/herbarium/pulls/14
Reviewed-by: Clément FRÉVILLE <clement.freville2@etu.uca.fr>

src/Service/ImageSafetyServiceInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace App\Service;
+
+use Symfony\Component\HttpFoundation\File\File;
+
+interface ImageSafetyServiceInterface
+{
+    public function isValid(File $file): bool;
+}