Restore toc entries under alerting.md; comment out notifications.md cross-ref

Author: nastasha-solomon

explore-analyze/alerting/kibana-alerting-experimental/rules/configure-a-rule.md

@@ -13,7 +13,10 @@ description: "Configure rules in the experimental alerting features: mode, ES|QL
 
 Configuring rules is part of the experimental alerting features in Kibana. The {{esql}} query defines what a rule detects. The settings on this page determine whether it behaves correctly in production: how often it runs, how it groups related problems, when it opens and closes alerts, and what it does when data stops arriving.
 
-For query authoring, refer to [Author rules](author-rules.md). For notification routing, refer to [Notifications](../notifications.md).
+For query authoring, refer to [Author rules](author-rules.md).
+<!-- TODO: Uncomment when PR #6525 (workflows/notifications) is merged:
+For notification routing, refer to [Notifications](../notifications.md).
+-->
 
 :::{note}
 Action policies are not configured on the rule form. You create them separately in the **Action policies** area and use KQL matchers to scope them to the episodes you want to route. The rule builder form does not link to policies.

explore-analyze/toc.yml

@@ -380,6 +380,18 @@ toc:
           - file: report-and-share/reporting-troubleshooting-pdf.md
   - file: alerting.md
     children:
+      - file: alerting/kibana-alerting-experimental/rules.md
+        children:
+          - file: alerting/kibana-alerting-experimental/rules/author-rules.md
+          - file: alerting/kibana-alerting-experimental/rules/esql-query-patterns.md
+          - file: alerting/kibana-alerting-experimental/rules/create-rule-from-rule-builder.md
+          - file: alerting/kibana-alerting-experimental/rules/create-rule-from-discover.md
+          - file: alerting/kibana-alerting-experimental/rules/create-rule-with-yaml.md
+            children:
+              - file: alerting/kibana-alerting-experimental/rules/yaml-rule-schema-reference.md
+          - file: alerting/kibana-alerting-experimental/rules/configure-a-rule.md
+          - file: alerting/kibana-alerting-experimental/rules/view-manage-rules.md
+          - file: alerting/kibana-alerting-experimental/rules/rule-event-field-reference.md
       - file: alerting/alerts.md
         children:
           - file: alerting/alerts/alerting-getting-started.md