[BYOIP, Aegis] Use labels and remove extra overviews (#16951)

* Hide index for BYOIP concepts and Aegis configuration options

* Adjust labels in aegis/about/index.mdx

src/content/docs/aegis/about/index.mdx

@@ -1,8 +1,11 @@
 ---
-title: How it works
+title: How Aegis works
 pcx_content_type: concept
 sidebar:
   order: 1
+  label: Egress IPs
+  group:
+    label: How it works
 head:
   - tag: title
     content: How Aegis works
@@ -11,7 +14,7 @@ head:
 
 :::caution[Warning]
 
-Cloudflare Aegis is available in early access to Enterprise customers. Contact your account team to request access. 
+Cloudflare Aegis is available in early access to Enterprise customers. Contact your account team to request access.
 :::
 
 When you use Cloudflare [as a reverse proxy](/fundamentals/concepts/how-cloudflare-works/#how-cloudflare-works-as-a-reverse-proxy), [Cloudflare's globl network](https://www.cloudflare.com/network/) sits between client requests and your origin servers.
@@ -38,7 +41,7 @@ Traditionally, Cloudflare maintains a very large pool of egress IPs that are use
 
 :::caution[Warning]
 
-[BYOIP](/byoip/) cannot be used as an Aegis egress IP. 
+[BYOIP](/byoip/) cannot be used as an Aegis egress IP.
 :::
 
 ## Benefits

src/content/docs/aegis/configuration-options/index.mdx

@@ -3,7 +3,8 @@ title: Configuration options
 pcx_content_type: navigation
 sidebar:
   order: 2
-
+  group:
+    hideIndex: true
 ---
 
 import { DirectoryListing } from "~/components"

src/content/docs/byoip/concepts/index.mdx

@@ -3,7 +3,8 @@ title: Concepts
 pcx_content_type: navigation
 sidebar:
   order: 3
-
+  group:
+    hideIndex: true
 ---
 
 import { DirectoryListing } from "~/components"