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>

app/helpers/portal_helper.rb

@@ -41,4 +41,8 @@ module PortalHelper
   def generate_article_link(portal_slug, article_slug, theme)
     "/hc/#{portal_slug}/articles/#{article_slug}#{theme.present? && theme != 'system' ? "?theme=#{theme}" : ''}"
   end
+
+  def render_category_content(content)
+    ChatwootMarkdownRenderer.new(content).render_markdown_to_plain_text
+  end
 end