website: resolve unlinked content, add check (#1157)

* website: add back unlinked pages to match previous state

* website: add unlinked content check

website/data/docs-nav-data-hidden.json

@@ -0,0 +1,53 @@
+[
+  {
+    "title": "Getting Started",
+    "routes": [
+      {
+        "title": "Installing",
+        "routes": [
+          {
+            "title": "Overview",
+            "path": "getting-started/installing"
+          },
+          {
+            "title": "Production",
+            "path": "getting-started/installing/production"
+          }
+        ]
+      }
+    ]
+  },
+  {
+    "title": "Common Workflows",
+    "routes": [
+      {
+        "title": "Overview",
+        "path": "common-workflows"
+      },
+      {
+        "title": "Manage Roles",
+        "path": "common-workflows/manage-roles"
+      },
+      {
+        "title": "Manage Scopes",
+        "path": "common-workflows/manage-scopes"
+      },
+      {
+        "title": "Manage Sessions",
+        "path": "common-workflows/manage-sessions"
+      },
+      {
+        "title": "Manage Targets",
+        "path": "common-workflows/manage-targets"
+      },
+      {
+        "title": "Manage Users and Groups",
+        "path": "common-workflows/manage-users-groups"
+      },
+      {
+        "title": "Workflow SSH Proxy",
+        "path": "common-workflows/workflow-ssh-proxycommand"
+      }
+    ]
+  }
+]