DOC-13857 - Tutorial on how to detect AVX2 CPU Extension (#52)

* Added content from pr 48

* Updated nav n prerequisite-and-setup files

* Added preview yml

* Edited-structured-added-lead-in-and-then-rewrote

* Set toc levels

* Fixed the header

* Removed page category variable

* Minor edit

* Implemented peer review comments

Author: rao-shwe

modules/ROOT/nav.adoc

@@ -147,6 +147,8 @@ include::partial$autogen-reference.adoc[]
  ** xref:tutorial-kubernetes-network-policy.adoc[Kubernetes Network Policies Using Deny-All Default]
 * Persistent Volumes
  ** xref:tutorial-volume-expansion.adoc[Persistent Volume Expansion]
+* Scheduling
+ ** xref:tutorial-avx2-scheduling.adoc[AVX2-Aware Scheduling]
 * Sync Gateway
  ** xref:tutorial-sync-gateway.adoc[Connecting Sync-Gateway to a Couchbase Cluster]
  ** xref:tutorial-sync-gateway-clients.adoc[Exposing Sync-Gateway to Couchbase Lite Clients]

modules/ROOT/pages/prerequisite-and-setup.adoc

@@ -177,6 +177,9 @@ The architecture of each node must be uniform across the cluster as the use of m
 NOTE: The official Couchbase docker repository contains multi-arch images which do not require explicit references to architecture tags when being pulled and deployed.
 However, when pulling from a private repository, or performing intermediate processing on a machine with a different architecture than the deployed cluster, the use of explicit tags may be required to ensure the correct images are deployed.
 
+IMPORTANT: For optimal performance with Couchbase Server 8.0 and later versions, in particular for vector search (FTS and GSI) workloads, use nodes that support AVX2 CPU instructions (x86-64-v3 Microarchitecture).
+For guidance on detecting AVX2 support and scheduling pods on AVX2-capable nodes, see xref:tutorial-avx2-scheduling.adoc[AVX2-Aware Scheduling for Couchbase Server].
+
 == RBAC and Networking Requirements
 
 Preparing the Kubernetes cluster to run the Operator may require setting up proper RBAC and network settings in your Kubernetes cluster.