[DOCS] Moves X-Pack configuration pages in table of contents (#19182)

x-pack/docs/en/monitoring/monitoring-xkib.asciidoc

@@ -5,6 +5,10 @@
 <titleabbrev>Configuring Monitoring</titleabbrev>
 ++++
 
+{monitoring} gives you insight into the operation of your {stack}. For more 
+information, see <<xpack-monitoring,{monitoring}>> and 
+{stack-ov}/xpack-monitoring.html[Monitoring the {stack}]. 
+
 . To monitor {kib}:
 
 .. Verify that the `xpack.monitoring.collection.enabled` setting is `true` on

x-pack/docs/en/setup/setup-xkb.asciidoc

@@ -1,9 +1,7 @@
 [role="xpack"]
 [[setup-xpack-kb]]
-= Set Up {xpack}
+== Set Up {xpack}
 
-[partintro]
---
 {xpack} is an Elastic Stack extension that provides security, alerting,
 monitoring, reporting, machine learning, graph, and many other capabilities. By 
 default, when you install {kib}, {xpack} is installed.
@@ -26,7 +24,6 @@ The **Management** page gains options related to configuring security. The
 other {xpack} features are mentioned in this documentation, we've added an icon
 to clearly indicate that what you're reading pertains to features available only
 in {xpack}.
---
 
 include::{xkb-repo-dir}/monitoring/monitoring-xkib.asciidoc[]
 include::{xkb-repo-dir}/security/securing-kibana.asciidoc[]