Add how-to page for using docs (#4841)

* init commit

* add how to page

* add animation

* feedback edits

* fix blockquote warnings

Author: sdwheeler

reference/docfx.json

@@ -90,6 +90,7 @@
             "uhfHeaderId": "MSDocsHeader-Powershell",
             "apiPlatform": "powershell",
             "ms.devlang": "powershell",
+            "titleSuffix": "PowerShell",
             "ROBOTS": "INDEX, FOLLOW",
             "feedback_system": "GitHub",
             "feedback_github_repo": "MicrosoftDocs/PowerShell-Docs",

reference/docs-conceptual/components/vscode/using-vscode.md

@@ -15,14 +15,15 @@
             "ms.tgt_pltfr": "windows, macos, linux",
             "author": "sdwheeler",
             "ms.author": "sewhee",
+            "titleSuffix": "PowerShell",
             "_op_documentIdPathDepotMapping": {
-              "reference/docs-conceptual/wmf/": { 
+              "reference/docs-conceptual/wmf/": {
                 "folder_relative_path_in_docset": "wmf/"
               }
             },
             "feedback_system": "GitHub",
-            "feedback_github_repo": "MicrosoftDocs/PowerShell-Docs",            
-            "feedback_product_url": "https://github.com/PowerShell/PowerShell/issues/new/choose"          
+            "feedback_github_repo": "MicrosoftDocs/PowerShell-Docs",
+            "feedback_product_url": "https://github.com/PowerShell/PowerShell/issues/new/choose"
         },
         "resource": [{
             "files": ["**/images/**", "**/*.png", "**/*.jpg"],

reference/docs-conceptual/docfx.json

@@ -0,0 +1,35 @@
+---
+ms.date:  09/25/2019
+keywords:  powershell,cmdlet
+title:  How to use the PowerShell documentation
+---
+# How to use the PowerShell documentation
+
+Welcome to the PowerShell online documentation. This site contains cmdlet reference for the
+following versions of PowerShell:
+
+- PowerShell 7 (preview)
+- PowerShell 6
+- PowerShell 5.1
+- PowerShell 5.0
+- PowerShell 4.0
+- PowerShell 3.0
+
+## Selecting your version
+
+By default, this site displays documentation for the latest released version of PowerShell. Some
+cmdlets work differently in various versions of PowerShell. Be sure you are viewing the
+documentation for the version of PowerShell you are using.
+
+Use the version picker at the top of the page to select the version of PowerShell you want.
+
+![version picker](images/how-to-use-docs/picker-vall.gif)
+
+## Searching for articles
+
+There are two ways to search for content in Docs. The simplest way is to use the filter box under
+the version selector. Just enter a word that appears in the title of an article. The page displays
+a list of matching articles. You can also select the option to search the entire site from that
+list.
+
+![filter box](images/how-to-use-docs/filter-search.gif)

reference/docs-conceptual/how-to-use-docs.md

@@ -1,3 +1,5 @@
+- name: How to use this documentation
+  href: how-to-use-docs.md
 - name: Overview
   href: overview.md
 - name: Install