Add a new page for deprecations, removals, and changes per version (#2053)

Co-authored-by: Reneta Popova <[email protected]>
Co-authored-by: Nick Giles <[email protected]>

Author: 3 people

modules/ROOT/content-nav.adoc

@@ -239,6 +239,9 @@
 
 * xref:procedures.adoc[]
 
+* Changes, deprecations, and removals
+** xref:changes-deprecations-removals.adoc[Neo4j 2025.x]
+
 * xref:tutorial/index.adoc[]
 //** xref:tutorial/local-causal-cluster.adoc[]
 //** xref:tutorial/causal-backup-restore-db.adoc[]