feat: Updated the design of the category page (#8165)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

lib/chatwoot_markdown_renderer.rb

@@ -18,6 +18,10 @@ class ChatwootMarkdownRenderer
     render_as_html_safe(html)
   end
 
+  def render_markdown_to_plain_text
+    CommonMarker.render_doc(@content, :DEFAULT).to_plaintext
+  end
+
   private
 
   def render_as_html_safe(html)