refactor: update dashboard layout and enhance Circleback connector configuration

- Modified the DashboardLayout to replace the "Sources" section with a "Documents" entry, improving navigation clarity.
- Updated the CirclebackConfig component to include an Info icon for configuration instructions and adjusted the webhook URL input to be disabled for better user experience.
- Enhanced the useConnectorDialog hook to handle non-indexable connectors more effectively, ensuring proper state management and user feedback.
- Improved icon mapping in the app sidebar for consistency across components.

surfsense_web/components/sidebar/app-sidebar.tsx

@@ -12,7 +12,9 @@ import {
 	FileText,
 	Info,
 	LogOut,
+	Logs,
 	type LucideIcon,
+	MessageCircle,
 	MessageCircleMore,
 	MoonIcon,
 	Podcast,
@@ -148,6 +150,8 @@ export const iconMap: Record<string, LucideIcon> = {
 	Podcast,
 	Users,
 	RefreshCw,
+	MessageCircle,
+	Logs,
 };
 
 const defaultData = {