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>

lib/chatwoot_hub.rb

@@ -19,10 +19,14 @@ class ChatwootHub
   end
 
   def self.pricing_plan
+    return 'community' unless ChatwootApp.enterprise?
+
     InstallationConfig.find_by(name: 'INSTALLATION_PRICING_PLAN')&.value || 'community'
   end
 
   def self.pricing_plan_quantity
+    return 0 unless ChatwootApp.enterprise?
+
     InstallationConfig.find_by(name: 'INSTALLATION_PRICING_PLAN_QUANTITY')&.value || 0
   end