Add Features section landing page (#564802)

Create features.md as a proper landing page for the Features
section of /windows/apps/develop/. Previously, clicking 'Features'
in the nav landed on the Accessibility article (the first item in
the section).

Changes:
- Add hub/apps/develop/features.md with table of all feature areas
- Update toc.yml to add href: features.md to the Features node
- Update apps-develop-overview.md include to point Features tile to
  the new page instead of accessibility.md

Co-authored-by: Copilot <[email protected]>

Author: GrantMeStrength

hub/apps/develop/features.md

@@ -0,0 +1,35 @@
+---
+title: Features for Windows app development
+description: Overview of the Windows app development features available to developers, including accessibility, AI, files, notifications, and more.
+ms.topic: overview
+ms.date: 03/26/2026
+ms.localizationpriority: medium
+---
+
+# Features for Windows app development
+
+Windows provides a rich set of platform features to help you build great apps. This section covers the APIs and capabilities available to Windows developers, from accessibility and AI to files, notifications, and the user interface.
+
+Some features are available in the [Windows App SDK](../windows-app-sdk/index.md). Others come from the Windows OS itself, via APIs in the [Windows SDK](https://developer.microsoft.com/windows/downloads/windows-sdk) or .NET.
+
+## Feature areas
+
+| Feature area | Description |
+|---|---|
+| [Accessibility](accessibility.md) | Build accessible apps with support for assistive technologies, keyboard navigation, and high-contrast modes. |
+| [AI-powered features](ai-powered/ai-powered.md) | Integrate on-device AI capabilities including Recall, Studio Effects, Click to Do, and Copilot key support. |
+| [App lifecycle and system services](app-lifecycle-and-system-services.md) | Manage app launch, activation, background tasks, power management, and system-level services. |
+| [App restore](windows-app-restore.md) | Restore app state after a Windows restart so users can pick up where they left off. |
+| [Audio, video, and camera](audio-video-camera.md) | Capture photos and video, play back media, and access audio hardware. |
+| [Communication](communication/index.md) | Add messaging, contacts, and calendar integration to your app. |
+| [Data and files](data-and-files.md) | Read and write files, manage folders, access removable storage, and query file properties. |
+| [Devices and sensors](devices-and-sensors.md) | Access hardware devices, sensors, and peripherals. |
+| [Graphics](graphics.md) | Create 2D and 3D visuals using DirectX, Direct2D, and other graphics APIs. |
+| [Input and interactions](input/index.md) | Handle touch, pen, keyboard, mouse, speech, and other input modalities. |
+| [Notifications](notifications/index.md) | Send toast and tile notifications to keep users informed. |
+| [OS integration](windows-integration/index.md) | Connect your app to Windows shell features, settings, and system capabilities. |
+| [Performance](performance/index.md) | Analyze and optimize the performance and responsiveness of your app. |
+| [Security and identity](security/index.md) | Authenticate users, protect data, and manage app permissions. |
+| [Speech](speech.md) | Add voice input and text-to-speech synthesis to your app. |
+| [Testing](testing/index.md) | Test and debug your Windows app using platform tools and best practices. |
+| [User interface](user-interface.md) | Build rich user interfaces with WinUI, XAML, and other UI frameworks. |

hub/apps/develop/toc.yml

@@ -4,6 +4,7 @@ items:
   - name: Develop overview
     href: index.md
   - name: Features
+    href: features.md
     expanded: true
     items:
     - name: Accessibility

hub/includes/apps-develop-overview.md

@@ -5,8 +5,8 @@ ms.date: 01/27/2026
 
 :::row:::
     :::column:::
-       [![Features icon](../apps/develop/images/tile-features.png)](../apps/design/accessibility/accessibility-overview.md)<br>
-        **[Features](../apps/design/accessibility/accessibility-overview.md)**<br>
+       [![Features icon](../apps/develop/images/tile-features.png)](../apps/develop/features.md)<br>
+        **[Features](../apps/develop/features.md)**<br>
         Explore the building blocks for creating rich Windows experiences.
     :::column-end:::
     :::column:::