separate and reorg develop TOC (#6089)

* split develop into new TOC, reorganize

* update links

* fix links

* fix links

* update WinUI/WASDK nodes

* move index to top of toc

* update nodes

* add links between sections

* add top index.yml

* fix links

* add navigation buttons

Author: jwmsft

hub/apps/design/index.md

@@ -5,6 +5,15 @@ ms.date: 10/28/2024
 ms.topic: article
 ms.localizationpriority: medium
 ---
+
+<div class="buttons margin-top-xs">
+	<a href="../desktop/index.yml" class="button button-sm"><span>Start</span></a>
+	<a href="" class="button button-sm button-primary button-filled"><span>Design</span></a>
+	<a href="../develop/index.md" class="button button-sm"><span>Develop</span></a>
+	<a href="../package-and-deploy/index.md" class="button button-sm"><span>Deploy</span></a>
+	<a href="../publish/index.md" class="button button-sm"><span>Distribute</span></a>
+</div>
+
 # Design for Windows apps
 
 Here, you'll find design guidelines and examples for creating Windows app experiences. Windows 11 incorporates Fluent's design language and principles for a cohesive look and feel that's uniquely Microsoft.

hub/apps/design/toc.yml

@@ -1,4 +1,6 @@
 items:
+  - name: Build Windows apps
+    href: ../desktop/index.yml
   - name: Overview
     href: index.md
   - name: Color
@@ -203,3 +205,11 @@ items:
         href: widgets/widgets-picker-integration.md
   - name: Design resources
     href: downloads/index.md
+  - name: Get started >>
+    href: ../get-started/index.md
+  - name: Develop >>
+    href: ../develop/index.md
+  - name: Package and deploy >>
+    href: ../package-and-deploy/index.md
+  - name: Distribute >>
+    href: ../publish/index.md

hub/apps/develop/index.md

@@ -6,6 +6,14 @@ ms.date: 06/28/2024
 ms.localizationpriority: medium
 ---
 
+<div class="buttons margin-top-xs">
+    <a href="../desktop/index.yml" class="button button-sm"><span>Start</span></a>
+    <a href="../design/index.md" class="button button-sm"><span>Design</span></a>
+    <a href="" class="button button-sm button-primary button-filled"><span>Develop</span></a>
+    <a href="../package-and-deploy/index.md" class="button button-sm"><span>Deploy</span></a>
+    <a href="../publish/index.md" class="button button-sm"><span>Distribute</span></a>
+</div>
+
 # Develop Windows desktop apps
 
 This section of the documentation provides information about APIs and features you can use while developing Windows desktop apps. Some of these features are available by using APIs in the [Windows App SDK](../windows-app-sdk/index.md). Other features are available by using APIs in the Windows OS (via the [Windows SDK](https://developer.microsoft.com/windows/downloads/windows-sdk)) and .NET, and don't require use of the Windows App SDK.