Add callout for unavailable feature (#95)

website/data/cloud-docs-agents-nav-data.json

@@ -7,7 +7,7 @@
   { "title": "Install and Run Agents", "path": "agents" },
   { "title": "Inject Custom Run Actions (Hooks)", "path": "hooks" },
   { "title": "Manage Agent Pools", "path": "agent-pools" },
-  { "title": "Request Forwarding", "path": "request-forwarding" },
+  { "title": "Request Forwarding", "path": "request-forwarding", "hidden": true },
   { "title": "Telemetry", "path": "telemetry" },
   { "title": "Logging", "path": "logging" },
   { "title": "Metrics", "path": "metrics" },

website/docs/cloud-docs/agents/request-forwarding.mdx

@@ -6,15 +6,15 @@ description: >-
 
 # Request Forwarding
 
+!> **Unavailable**: Request forwarding is not currently available in Terraform Cloud features. We are actively working on this mechanism and will update this page when it is widely available.
+
 You can configure Terraform Cloud Agents to handle HTTP and HTTPS
 request forwarding on behalf of Terraform Cloud. This enables Terraform Cloud to access
 services in private networks without requiring direct inbound network access.
 
-Only specific features and use cases will use agent request forwarding to
+Only specific features and use cases use agent request forwarding to
 fulfill requests.
 
--> **Note:** Refer to [Terraform Cloud pricing](https://www.hashicorp.com/products/terraform/pricing) for details on which features can use request forwarding.
-
 ## Request Forwarding Architecture
 
 Request forwarding is an additional function that you can enable on a per-agent