Adds landing pages for ES client and APM agent RNs

release-notes/apm-agents/index.md

@@ -0,0 +1,6 @@
+---
+navigation_title: "Elastic APM agents"
+---
+
+# Elastic APM agents release notes [elastic-apm--agents-release-notes]
+Review the changes, fixes, and more in each version of the Elastic APM agents.

release-notes/apm-agents/toc.yml

@@ -0,0 +1,2 @@
+toc:
+  - file: index.md

release-notes/elasticsearch-clients/index.md

@@ -0,0 +1,7 @@
+---
+navigation_title: "Elasticsearch Clients"
+---
+
+# Elasticsearch Clients release notes [elasticsearch-clients-release-notes]
+Review the changes, fixes, and more in each version of the Elasticsearch Clients.
+

release-notes/elasticsearch-clients/toc.yml

@@ -0,0 +1,2 @@
+toc:
+  - file: index.md

release-notes/toc.yml

@@ -1,7 +1,9 @@
 toc:
   - file: index.md
   - toc: intro
+  - toc: elasticsearch-clients
   - toc: elastic-observability
+  - toc: apm-agents
   - toc: elastic-security
   - toc: elastic-cloud-serverless
   - toc: fleet-elastic-agent