feat: Add parameter reference notice

Author: ADubhlaoich

_banners/waf-parameter-reference.md

@@ -0,0 +1,7 @@
+{{< banner "note" "Policy parameter reference" >}}
+
+You can explore the parameters for each F5 WAF for NGINX feature on the [Policy parameter reference]({{< ref "/waf/policies/parameter-reference.md" >}}) page.
+
+This page was previously referred to as the "Declarative Policy".
+
+{{< /banner >}}

content/waf/policies/_index.md

@@ -1,5 +1,11 @@
 ---
 title: "Policies"
 url: /waf/policies/
+cascade:
+  nd-banner:
+    enabled: true
+    type: deprecation
+    start-date: 2025-09-30
+    md: /_banners/waf-parameter-reference.md
 weight: 400
 ---