Add comments support (#893)

* Added comments to theme

* Cleanup

* Updated spacing and typography

* Removed bottom border

* Added comment counter

* Updated theme name and post template

* Added search support

* Compiled css for search

* Removed the border and brackets for comment count

* Moved the comments helper into the content block so it gets the same paddings at narrow viewports

* Package version bump

* Updated comments helper in post template

* Final tweaks for the comments support

* Revert the package info

* Update {{comment_count}} helper usage

The helper now outputs a span wrapper by default, so we won't have to add a wrapper in the theme

Co-authored-by: Peter Zimon <peter.zimon@gmail.com>
Co-authored-by: Sanne de Vries <sannedv@protonmail.com>
Co-authored-by: James Morris <moreofmorris@users.noreply.github.com>

partials/post-card.hbs

@@ -66,9 +66,11 @@ which templates loop over to generate a list of posts. --}}
         <footer class="post-card-meta">
             <time class="post-card-meta-date" datetime="{{date format="YYYY-MM-DD"}}">{{date}}</time>
             {{#if reading_time}}
-                <span class="sep">—</span>
                 <span class="post-card-meta-length">{{reading_time}}</span>
             {{/if}}
+            {{#if @site.comments_enabled}}
+                {{comment_count}}
+            {{/if}}
         </footer>
 
     </div>