docs: bifurcate documentation into user and admin sections (#38196)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

docs/sidebarTutorials.js

@@ -42,6 +42,7 @@ const sidebars = {
         'contributing/howtos',
         'contributing/release-process',
         'contributing/resources',
+        'contributing/pkg-resources-migration',
         'guidelines/design-guidelines',
         {
           type: 'category',
@@ -91,6 +92,7 @@ const sidebars = {
           collapsed: true,
           items: [
             'extensions/extension-points/sqllab',
+            'extensions/extension-points/editors',
           ],
         },
         'extensions/development',
@@ -127,9 +129,21 @@ const sidebars = {
       ],
     },
     {
-      type: 'link',
+      type: 'category',
       label: 'API Reference',
-      href: '/docs/api',
+      link: {
+        type: 'doc',
+        id: 'api',
+      },
+      items: (() => {
+        try {
+          // eslint-disable-next-line @typescript-eslint/no-require-imports
+          return require('./developer_docs/api/sidebar.js');
+        } catch {
+          // Generated by `yarn generate:api-docs`; empty until then
+          return [];
+        }
+      })(),
     },
   ],
 };