feat: Adds support for superscript in help center articles (#7279)

- Adds support for superscript when rendering article markdown
- Chatwoot Markdown Render to render markdown everywhere

Co-authored-by: Sojan <sojan@pepalo.com>

app/helpers/message_format_helper.rb

@@ -7,8 +7,6 @@ module MessageFormatHelper
   end
 
   def render_message_content(message_content)
-    # rubocop:disable Rails/OutputSafety
-    CommonMarker.render_html(message_content).html_safe
-    # rubocop:enable Rails/OutputSafety
+    ChatwootMarkdownRenderer.new(message_content).render_message
   end
 end