rdv: add fullcalendar.js as a vuejs component (POC)

src/Bundle/ChillCalendarBundle/Resources/public/vuejs/Calendar/App.vue

@@ -1,14 +1,17 @@
 <template>
    <concerned-groups></concerned-groups>
+   <calendar-range></calendar-range>
 </template>
 
 <script>
 import ConcernedGroups from 'ChillActivityAssets/vuejs/Activity/components/ConcernedGroups.vue';
+import CalendarRange from '../_components/CalendarRange/CalendarRange.vue';
 
 export default {
    name: "App",
    components: {
       ConcernedGroups,
+      CalendarRange
    }
 }
 </script>