Feature: [docgen][person] add a new context to generate document with a

third party

This allow to prepare, for instance, mail (letters) to a thirdparty
about a Person

src/Bundle/ChillDocGeneratorBundle/Resources/views/Generator/basic_form.html.twig

@@ -2,6 +2,14 @@
 
 {% block title 'docgen.Generate a document'|trans %}
 
+{% block js %}
+    {{ encore_entry_script_tags('mod_pickentity_type') }}
+{% endblock %}
+
+{% block css %}
+    {{ encore_entry_link_tags('mod_pickentity_type') }}
+{% endblock %}
+
 {% block content %}
 <div class="col-md-10 col-xxl">
     <h1>{{ block('title') }}</h1>