Preserve sidebar scroll position when navigating between documents

- Add x-navigate:scroll directive to sidebar container to maintain scroll position
- Add x-navigate:scroll to all document links in sidebar (tree-item.blade.php)
- Add x-navigate:scroll to 'New Document' button
- When clicking a link in sidebar, the sidebar scroll position is now preserved during page navigation
- Fixes issue where sidebar would scroll to top after loading a document

src/resources/views/layouts/knowledge-base.blade.php

@@ -200,6 +200,7 @@ class="absolute right-0 mt-2 w-48 bg-white rounded-md shadow-lg py-1 ring-1 ring
             <div class="flex h-[calc(100vh-4rem)]">
                 <!-- Sidebar - Desktop -->
                 <aside 
+                    x-navigate:scroll
                     class="hidden lg:block bg-white border-r border-gray-200 overflow-y-auto relative"
                     :style="'width: ' + sidebarWidth + 'px'"
                 >