move service form.type definition to new file + introduce date type

Form/Type/ChillDateType.php

@@ -0,0 +1,47 @@
+<?php
+/*
+ * Copyright (C) 2017 Champs Libres Cooperative <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+namespace Chill\MainBundle\Form\Type;
+
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\Extension\Core\Type\DateType;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * Display the date in a date picker.
+ * 
+ * Extends the symfony `Symfony\Component\Form\Extension\Core\Type\DateType`
+ * to automatically create a date picker.
+ *
+ * @author Julien Fastré <julien.fastre@champs-libres.coop>
+ */
+class ChillDateType extends AbstractType
+{
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver
+            ->setDefault('widget', 'single_text')
+            ->setDefault('attr', [ 'class' => 'datepicker' ])
+            ->setDefault('format', 'dd-MM-yyyy')
+            ;
+    }
+    
+    public function getParent()
+    {
+        return DateType::class;
+    }
+}