refactor: simplify dashboard layout by removing unused navigation props and implementing a new DocumentsSidebar for better document management

surfsense_web/components/layout/ui/sidebar/index.ts

@@ -1,6 +1,7 @@
 export { AllPrivateChatsSidebar } from "./AllPrivateChatsSidebar";
 export { AllSharedChatsSidebar } from "./AllSharedChatsSidebar";
 export { ChatListItem } from "./ChatListItem";
+export { DocumentsSidebar } from "./DocumentsSidebar";
 export { InboxSidebar } from "./InboxSidebar";
 export { MobileSidebar, MobileSidebarTrigger } from "./MobileSidebar";
 export { NavSection } from "./NavSection";