A first VueJS component, get api datas, a simple button add person

* !! composer require serializer !!
* see: http://localhost:8001/fr/parcours/861/show

src/Bundle/ChillPersonBundle/Resources/views/AccompanyingCourse/show.html.twig

@@ -8,6 +8,7 @@
 
     <h1>{{ block('title') }}</h1>
 
+{#
     <pre>
 {{ accompanyingCourse.id }}
 {{ accompanyingCourse.openingDate|format_date('short') }}
@@ -20,10 +21,9 @@ usagers:
     {{ p.person.id }} | <a href="{{ path('chill_person_accompanying_period_list', { person_id: p.person.id }) }}">{{ p.person.fullnamecanonical }}</a> | {{ p.startdate|format_date('short') }} | {{ p.enddate|format_date('short') }}
 {% endfor %}
     </pre>
-
     {{ dump() }}
+#}
 
-    <h3>TESTS AREA vuejs:</h3>
     {% verbatim %}
         <div id="app" data-name="{{ app.user.username }}"></div>
     {% endverbatim %}