add reference architectures and why cf

Author: rita3ko

src/content/docs/agents/capabilities/control-web-browsers.mdx

@@ -1,20 +1,10 @@
 ---
-type: concept
-title: Control Web Browsers
-pcx_content_type: concept
+pcx_content_type: navigation
+title: Control Web Browsers (Browser Rendering API)
+external_link: /browser-rendering/
 sidebar:
   order: 1
----
-
-import {
-	Render,
-	PackageManagers,
-	Steps,
-	FileTree,
-	Details,
-	Tabs,
-	TabItem,
-	WranglerConfig,
-} from "~/components";
+head: []
+description: The Workers Browser Rendering API allows developers to programmatically control and interact with a headless browser instance and create automation flows for their applications and products.
 
-Control web browsers
+---

src/content/docs/agents/capabilities/human-in-the-loop.mdx

@@ -0,0 +1,9 @@
+---
+pcx_content_type: navigation
+title: Run models (Workers AI)
+external_link: /workers-ai/
+sidebar:
+  order: 2
+head: []
+description: Run popular open-source AI models on Cloudflare's network. 
+---

src/content/docs/agents/capabilities/multiplayer.mdx

@@ -1,22 +1,11 @@
 ---
-type: concept
+pcx_content_type: navigation
 title: Send Email
-pcx_content_type: concept
+external_link: /email-routing/email-workers/send-email-workers/
 sidebar:
-  order: 3
+  order: 2
+head: []
+description: Send emails from your Worker for async updates to a user. 
 ---
 
-import {
-	Render,
-	PackageManagers,
-	Steps,
-	FileTree,
-	Details,
-	Tabs,
-	TabItem,
-	WranglerConfig,
-} from "~/components";
 
-Send email
-
-https://developers.cloudflare.com/email-routing/email-workers/send-email-workers/