(Windows) deprecate Windows platform in documentation (#1118)

Author: Chris Brody

www/docs/en/dev/guide/platforms/windows/index.md

@@ -18,11 +18,13 @@ license: >
     under the License.
 
 title: Windows Platform Guide
-toc_title: Windows
+toc_title: Windows (deprecated)
 ---
 
 # Windows Platform Guide
 
+**NOTICE:** The Windows platform is now deprecated and may be removed from a future version of Cordova.
+
 This guide shows how to set up your SDK development environment to build and deploy Cordova apps Windows 10 (Universal Windows Platform [= UWP], formerly known as Universal App Platform [= UAP]), Windows 8.1 and Windows Phone 8.1.  It shows how to use either shell tools to generate and build apps, or the cross-platform Cordova CLI. (See the [Overview](../../overview/index.html#development-paths) for a comparison of these development options.) This section also shows how to modify Cordova apps within Visual Studio. Regardless of [which approach](../../overview/index.html#development-paths) you take, you need to install the Visual Studio SDK, as described below.
 
 Cordova Windows on Windows 8.1 and Windows Phone 8.1 rely on Internet Explorer 11 as their rendering engine, so as a practical matter you can use IE's powerful debugger to test any web content that doesn't invoke Cordova APIs.  The Windows Phone Developer Blog provides [helpful guidance](https://blogs.windows.com/buildingapps/2012/11/15/adapting-your-webkit-optimized-site-for-internet-explorer-10/#qYPwLJDbYKToOveG.97) on how to support IE along with comparable WebKit browsers.