DOC-9971 install in nav

Author: RichardSmedley

modules/ROOT/nav.adoc

@@ -74,6 +74,8 @@
 * xref:project-docs:distributed-transactions-dotnet-release-notes.adoc[Transactions Release Notes]
 * xref:project-docs:compatibility.adoc[Compatibility]
  ** xref:project-docs:migrating-sdk-code-to-3.n.adoc[Migrating to SDK 3 API]
+* xref:project-docs:sdk-full-installation.adoc[Full Installation]
+// ** xref:hello-world:platform-help.adoc[Platform Introduction]
 * xref:project-docs:sdk-licenses.adoc[Licenses]
 * xref:project-docs:get-involved.adoc[Get involved]
  ** https://docs.couchbase.com/home/contribute/index.html[Improve the Docs]