Add support for CW in comments (#308)

All the backend/federation code was already, I just added the UI 🤷‍♀️ 

Fixes #253

templates/macros.html.tera

@@ -60,7 +60,16 @@
             <span class="display-name">{{ comm.author.name }}</span>
             <small>@{{ comm.author.fqn }}</small>
         </a>
-        <div class="text">{{ comm.content | safe }}</div>
+        <div class="text">
+            {% if comm.sensitive %}
+                <details>
+                    <summary>{{ comm.spoiler_text }}</summary>
+            {% endif %}
+            {{ comm.content | safe }}
+            {% if comm.sensitive %}
+                </details>
+            {% endif %}
+        </div>
         <a class="button icon icon-message-circle" href="?responding_to={{ comm.id }}">{{ "Respond" | _ }}</a>
         {% for res in comm.responses %}
             {{ self::comment(comm=res) }}

templates/posts/details.html.tera

@@ -119,6 +119,15 @@
 
             {% if account %}
                 <form method="post" action="{{ article.url }}comment">
+                    {{ macros::input(
+                        name="warning",
+                        label="Content warning",
+                        optional=true,
+                        form=comment_form,
+                        errors=comment_errors,
+                        default=default)
+                    }}
+
                     <label for="plume-editor">{{ "Your comment" | _ }}</label>
                     {% if previous %}
                         <input type="hidden" name="responding_to" value="{{ previous.id }}"/>