refactor(layout): streamline layout components with RoutedSectionShell

- Introduced RoutedSectionShell to unify navigation structure across Playground, User Settings, and Workspace Settings layouts.
- Replaced individual navigation implementations with a more cohesive and reusable component.
- Updated navigation items to include href properties for better routing.
- Enhanced mobile navigation experience with drawer support and improved scroll handling.

surfsense_web/components/layout/index.ts

@@ -9,6 +9,7 @@ export type {
 	User,
 	Workspace,
 } from "./types/layout.types";
+export type { RoutedSectionGroup, RoutedSectionItem } from "./ui";
 export {
 	ChatListItem,
 	CreateWorkspaceDialog,
@@ -20,6 +21,7 @@ export {
 	MobileSidebarTrigger,
 	NavIcon,
 	NavSection,
+	RoutedSectionShell,
 	Sidebar,
 	SidebarCollapseButton,
 	SidebarHeader,