Make it possible to tag articles and display them

templates/posts/details.html.tera

@@ -34,6 +34,11 @@
 
     <div class="article-meta">
         <p>{{ "This article is under the {{ license }} license." | _(license=article.post.license) }}</p>
+        <ul class="tags">
+            {% for tag in article.tags %}
+                <li>{{ tag.tag }}</li>
+            {% endfor %}
+        </ul>
         <div class="flex">
             <img src="{{ author.avatar }}" alt="{{ author.name }}" class="avatar medium padded">
             <div class="grow">

templates/posts/new.html.tera

@@ -20,6 +20,8 @@
     <label for="content">{{ "Content" | _ }}<small>{{ "Markdown is supported" | _ }}</small></label>
     <textarea id="content" name="content" value="{{ form.content | default(value="") }}" rows="20"></textarea>
 
+    {{ macros::input(name="tags", label="Tags, separated by commas", errors=errors, form=form, optional=true) }}
+
     {% set license_infos = "Default license will be {{ instance.default_license }}" | _(instance=instance) %}
     {{ macros::input(name="license", label="License", errors=errors, form=form, optional=true, details=license_infos) }}