Add Nexus Go SDK Quick Start page (#4376)

* Add Nexus Go SDK quickstart

* Add slug in feature guide

* remove slug

---------

Co-authored-by: Jwahir Sundai <jwahir.sundai@temporal.io>

Author: long-nt-tran

docs/develop/go/index.mdx

@@ -149,14 +149,14 @@ Use compression, encryption, and other data handling by implementing custom conv
 
 ## Temporal Nexus
 
-The [Temporal Nexus](/develop/go/nexus) feature guide shows how to use Temporal Nexus to connect durable executions within and across Namespaces using a Nexus Endpoint, a Nexus Service contract, and Nexus Operations.
-
-- [Create a Nexus Endpoint to route requests from caller to handler](/develop/go/nexus#create-nexus-endpoint)
-- [Define the Nexus Service contract](/develop/go/nexus#define-nexus-service-contract)
-- [Develop a Nexus Service and Operation handlers](/develop/go/nexus#develop-nexus-service-operation-handlers)
-- [Develop a caller Workflow that uses a Nexus Service](/develop/go/nexus#develop-caller-workflow-nexus-service)
-- [Make Nexus calls across Namespaces with a dev Server](/develop/go/nexus#nexus-calls-across-namespaces-dev-server)
-- [Make Nexus calls across Namespaces in Temporal Cloud](/develop/go/nexus#nexus-calls-across-namespaces-temporal-cloud)
+The [Temporal Nexus](/develop/go/nexus/feature-guide) feature guide shows how to use Temporal Nexus to connect durable executions within and across Namespaces using a Nexus Endpoint, a Nexus Service contract, and Nexus Operations.
+
+- [Create a Nexus Endpoint to route requests from caller to handler](/develop/go/nexus/feature-guide#create-nexus-endpoint)
+- [Define the Nexus Service contract](/develop/go/nexus/feature-guide#define-nexus-service-contract)
+- [Develop a Nexus Service and Operation handlers](/develop/go/nexus/feature-guide#develop-nexus-service-operation-handlers)
+- [Develop a caller Workflow that uses a Nexus Service](/develop/go/nexus/feature-guide#develop-caller-workflow-nexus-service)
+- [Make Nexus calls across Namespaces with a dev Server](/develop/go/nexus/feature-guide#nexus-calls-across-namespaces-dev-server)
+- [Make Nexus calls across Namespaces in Temporal Cloud](/develop/go/nexus/feature-guide#nexus-calls-across-namespaces-temporal-cloud)
 
 ## [Durable Timers](/develop/go/timers)
 

docs/develop/go/temporal-nexus.mdx docs/develop/go/nexus/feature-guide.mdxdocs/develop/go/temporal-nexus.mdx renamed to docs/develop/go/nexus/feature-guide.mdx

@@ -1,7 +1,7 @@
 ---
-id: nexus
+id: feature-guide
 title: Temporal Nexus - Go SDK feature guide
-sidebar_label: Temporal Nexus
+sidebar_label: Feature Guide
 description: Use Temporal Nexus within the Go SDK to connect durable executions within and across Namespaces using a Nexus Endpoint, a Nexus Service contract, and Nexus Operations.
 toc_max_heading_level: 4
 keywords:
@@ -605,12 +605,9 @@ tcld nexus endpoint create \
   --name <my-nexus-endpoint-name> \
   --target-task-queue my-handler-task-queue \
   --target-namespace <my-target-namespace.account> \
-  --allow-namespace <my-caller-namespace.account> \
   --description-file description.md
 ```
 
-The `--allow-namespace` is used to build an Endpoint allowlist of caller Namespaces that can use the Nexus Endpoint, as described in Runtime Access Control.
-
 Alternatively, you can create a Nexus Endpoint through the UI: [https://cloud.temporal.io/nexus](https://cloud.temporal.io/nexus).
 
 ### Run Workers Connected to Temporal Cloud with TLS certificates