Migrate .NET 3.1/5 WPF guide from dotnet docs (#48)

* add toc/bread changes

* add xaml-services

* add ported wpf content

* add xaml-services info to docfx

* Fix links 1

* Fix links 2

* Fix links 3

* Fix links 4

* Fix links 5

* Fix links 6

* Fix links 7

* Fix xaml-services link

* Fix snippets 1

* Fix snippets 2

* adjust breadcrumb and toc

* remove preserve-view from breadcrumbs

* add empty view to toc item xaml

* update include

* remove contextual toc for vs article :(

dotnet-desktop-guide/framework/breadcrumb/toc.yml

@@ -1,15 +1,15 @@
 items:
 - name: Docs
-  tocHref: /?view=&preserve-view=true
-  topicHref: /?view=&preserve-view=true
+  tocHref: /
+  topicHref: /
   items:
     - name: .NET
-      tocHref: /dotnet/?view=&preserve-view=true
-      topicHref: /dotnet/index?view=&preserve-view=true
+      tocHref: /dotnet/
+      topicHref: /dotnet/index
       items:
       - name: Desktop Guide
-        tocHref: /dotnet/desktop?view=&preserve-view=true
-        topicHref: /dotnet/desktop/index?view=&preserve-view=true
+        tocHref: /dotnet/desktop
+        topicHref: /dotnet/desktop/index
         items:
         - name: .NET Framework
           items: