Upgrade LBCAlerte to version 3.3

Add upgrade script

sources/app/api/annonce/delete.php

@@ -0,0 +1,16 @@
+<?php
+if (empty($_POST["id"])) {
+    return array(
+        "data" => $_POST,
+        "errors" => array(
+            "id" => "Un ID doit être fourni"
+        )
+    );
+}
+
+$ad = $storage->fetchById($_POST["id"]);
+if ($ad) {
+    $storage->delete($ad);
+    $adPhoto = new App\Storage\AdPhoto($userAuthed);
+    $adPhoto->delete($ad);
+}