Paginate posts (#9)

Squashed commit of the following:
Author: matis.mazingue <matis.mazingue@etu.uca.fr>
Author: clfreville2 <clement.freville2@etu.uca.fr>

templates/post/index.html.twig

@@ -0,0 +1,21 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Posts{% endblock %}
+
+{% block body %}
+{% for post in posts.iterator %}
+    <div class="card" style="width: 42rem; margin: 20px 0 50px 100px;">
+        <div class="card-body">
+            <h5 class="card-title">{{ post.species ? post.species.vernacularName : 'Post' }}</h5>
+            <h6 class="card-subtitle mb-2 text-muted">{{ post.foundDate | date("d/m/Y \\à H \\h") }}</h6>
+            <p class="card-subtitle mb-2 text-muted">{{ post.latitude }}, {{ post.longitude }}, {{ post.altitude }}m</p>
+            <p class="card-text">{{ post.commentary }}</p>
+        </div>
+        <div class="card-footer">
+            28 ❤️
+            128 💬
+        </div>
+    </div>
+{% endfor %}
+{% include '_pagination.html.twig' %}
+{% endblock %}