Add post and species forms

Squashed commit of the following:
Author: Hugo PRADIER <Hugo.PRADIER2@etu.uca.fr>
Author: bastien ollier <bastien.ollier@etu.uca.fr>
Author: clfreville2 <clement.freville2@etu.uca.fr>
Reviewed on #7

templates/species/show.html.twig

@@ -0,0 +1,36 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Species{% endblock %}
+
+{% block body %}
+<h1>{{ species.vernacularName }}</h1>
+<p>
+    🔬 Nom Scientifique : {{ species.scientificName }}<br/>
+    📍 Region : {{ species.region }}
+</p>
+
+<div>
+    <h2>Posts :</h2>
+
+    {% for post in species.posts %}
+        <div>
+            <dt>
+                <h3>{{ post.publicationDate | date }}</h3>
+            </dt>
+            <dl>
+                <dt>📍Géolocalisation</dt>
+                <dd>{{ post.longitude }} - {{ post.latitude }}</dd>
+
+                <dt>📍Commentaire</dt>
+                <dd>{{ post.getCommentary }}</dd>
+            </dl>
+        </div>
+    {% endfor %}
+
+    <a href="{{ path('app_species_index') }}">back to list</a>
+
+    <a href="{{ path('app_species_edit', {'id': species.id}) }}">edit</a>
+
+    {{ include('species/_delete_form.html.twig') }}
+</div>
+{% endblock %}