chore: Add submenu for super admin settings (#11860)

- Improve how settings are rendered in Chatwoot Super admin panel
- Add google settings support 
- show setting for community edition

##  Settings page - community edition
<img width="1702" alt="Screenshot 2025-07-08 at 9 08 03 PM"
src="https://github.com/user-attachments/assets/0434f56f-ea74-44a8-a7b0-8e26fab88093"
/>

## Expanded settings
<img width="1675" alt="Screenshot 2025-07-03 at 2 17 16 AM"
src="https://github.com/user-attachments/assets/3aa1f888-c54a-4b58-896a-0d3e828fa176"
/>

---------

Co-authored-by: Sojan Jose <sojan@Sojans-MacBook-Pro.local>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/views/super_admin/application/_navigation.html.erb

@@ -39,14 +39,13 @@ as defined by the routes in the `admin/` namespace
             label: display_resource_name(resource),
           }
         %>
+
       <% end %>
+      <%= render 'settings_menu', open: settings_open? %>
     </ul>
   </div>
   <div>
     <ul class="my-4">
-      <% if ChatwootApp.enterprise? %>
-      <%= render partial: "nav_item", locals: { icon: 'icon-settings-2-line', url: super_admin_settings_url, label: 'Settings' } %>
-      <% end %>
       <%= render partial: "nav_item", locals: { icon: 'icon-mist-fill', url: sidekiq_web_url, label: 'Sidekiq Dashboard' } %>
       <%= render partial: "nav_item", locals: { icon: 'icon-health-book-line', url: super_admin_instance_status_url, label: 'Instance Health' } %>
       <%= render partial: "nav_item", locals: { icon: 'icon-dashboard-line', url: '/', label: 'Agent Dashboard' } %>