feat: Super admin design improvements (#8517)

- Revamp the super admin design
- Introduce a new settings page for support and billing settings
- Move the access tokens into users, agent bots and platform app show pages


Co-authored-by: Sojan <sojan@pepalo.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/dashboards/user_dashboard.rb

@@ -36,7 +36,8 @@ class UserDashboard < Administrate::BaseDashboard
     updated_at: Field::DateTime,
     pubsub_token: Field::String,
     type: Field::Select.with_options(collection: [nil, 'SuperAdmin']),
-    accounts: CountField
+    accounts: CountField,
+    access_token: Field::HasOne
   }.freeze
 
   # COLLECTION_ATTRIBUTES
@@ -67,6 +68,7 @@ class UserDashboard < Administrate::BaseDashboard
     updated_at
     confirmed_at
     account_users
+    access_token
   ].freeze
 
   # FORM_ATTRIBUTES