[Reference Architecture] Cleaning up Overview pages (#18683)

* Removing Overview pages which have no text (pages with only bullet list of links).

* Removing Overview sidebars which did contain text.

Author: Oxyjun

src/content/docs/reference-architecture/architectures/index.mdx

@@ -2,6 +2,8 @@
 title: Reference Architectures
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 4
 ---
 

src/content/docs/reference-architecture/design-guides/index.mdx

@@ -2,6 +2,8 @@
 title: Design Guides
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 6
 ---
 

src/content/docs/reference-architecture/diagrams/ai/index.mdx

@@ -2,6 +2,8 @@
 title: Artificial Intelligence (AI)
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 
 ---

src/content/docs/reference-architecture/diagrams/bots/index.mdx

@@ -2,6 +2,8 @@
 title: Bots
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 ---
 

src/content/docs/reference-architecture/diagrams/content-delivery/index.mdx

@@ -2,6 +2,8 @@
 title: Content Delivery
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 
 ---

src/content/docs/reference-architecture/diagrams/index.mdx

@@ -2,6 +2,8 @@
 title: Reference Architecture Diagrams
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 5
 ---
 

src/content/docs/reference-architecture/diagrams/iot/index.mdx

@@ -2,6 +2,8 @@
 title: Internet of Things (IoT)
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 ---
 

src/content/docs/reference-architecture/diagrams/network/index.mdx

@@ -2,6 +2,8 @@
 title: Network
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 
 ---

src/content/docs/reference-architecture/diagrams/sase/index.mdx

@@ -2,6 +2,8 @@
 title: Secure Access Service Edge (SASE)
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 
 ---

src/content/docs/reference-architecture/diagrams/security/index.mdx

@@ -2,6 +2,8 @@
 title: Security
 pcx_content_type: navigation
 sidebar:
+  group:
+    hideIndex: true
   order: 2
 
 ---