otf: add data attributes and pass them in vue component

src/Bundle/ChillMainBundle/Resources/views/OnTheFly/_insert_vue_onthefly.html.twig

@@ -3,10 +3,19 @@
     It push all variables from context in OnTheFly/App.vue.
 
     OPTIONS
-    *
+    * targetEntity  {
+          name:     string  'person', 'thirdparty'
+          id:       integer
+      }
+    * action        'show', 'edit', 'create'
+
 #}
 <div class="onthefly-container"
 
+     data-target-name="{{ targetEntity.name|e('html_attr') }}"
+     data-target-id="{{ targetEntity.id|e('html_attr') }}"
+     data-action="{{ action|e('html_attr') }}"
+
 ></div>
 
 {{ encore_entry_script_tags('vue_onthefly') }}