rdv: add route, twig for listing and creating calendar items

src/Bundle/ChillCalendarBundle/Resources/views/Calendar/listByAccompanyingCourse.html.twig

@@ -0,0 +1,9 @@
+{% extends "@ChillPerson/AccompanyingCourse/layout.html.twig"  %}
+
+{% set activeRouteKey = 'chill_calendar_calendar_list' %}
+
+{% block title %}{{ 'Calendar list' |trans }}{% endblock title %}
+
+{% block content %}
+    {% include 'ChillCalendarBundle:Calendar:list.html.twig' with {'context': 'accompanyingCourse'} %}
+{% endblock %}