feat: Implement notification system with real-time updates and Electric SQL integration

- Added notifications table to the database schema with replication support for Electric SQL.
- Developed NotificationService to manage indexing notifications, including creation, updates, and status tracking.
- Introduced NotificationButton and NotificationPopup components for displaying notifications in the UI.
- Enhanced useNotifications hook for real-time notification syncing using PGlite live queries.
- Updated package dependencies for Electric SQL and improved error handling in notification processes.

surfsense_web/components/layout/ui/header/Header.tsx

@@ -3,6 +3,7 @@
 import { Moon, Sun } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
+import { NotificationButton } from "@/components/notifications/NotificationButton";
 
 interface HeaderProps {
 	breadcrumb?: React.ReactNode;
@@ -29,6 +30,9 @@ export function Header({
 
 			{/* Right side - Actions */}
 			<div className="flex items-center gap-2">
+				{/* Notifications */}
+				<NotificationButton />
+
 				{/* Theme toggle */}
 				{onToggleTheme && (
 					<Tooltip>