Move to Symfony Flex

The structure changed completely.
Bundles are gone. Everything is flatten in the folder `src`.
I separated import & api controllers to avoid _pollution_ in the main controller folder.

templates/Import/index.html.twig

@@ -0,0 +1,30 @@
+{% extends "layout.html.twig" %}
+
+{% block title %}{{ 'import.page_title'|trans }}{% endblock %}
+
+{% block messages %}
+    {{ render(controller('App\\Controller\\Import\\ImportController::checkQueueAction')) }}
+
+    {{ parent() }}
+{% endblock %}
+
+{% block content %}
+<div class="row">
+    <div class="col s12">
+        <div class="card-panel settings">
+            {% include 'Import/_information.html.twig' %}
+
+            {{ 'import.page_description'|trans }}
+            <ul>
+                {% for import in imports %}
+                    <li>
+                        <h5>{{ import.name }}</h5>
+                        <blockquote>{{ import.description|trans|raw }}</blockquote>
+                        <p><a class="waves-effect waves-light btn" href="{{ path(import.url) }}">{{ 'import.action.import_contents'|trans }}</a></p>
+                    </li>
+                {% endfor %}
+            </ul>
+        </div>
+    </div>
+</div>
+{% endblock %}