windows/*: add more PowerShell commands (#11612)

* windows/*: add more PowerShell commands

* get-commandL fix typo

* Update install-module.md

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

---------

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/windows/get-wuapiversion.md

@@ -0,0 +1,13 @@
+# Get-WUApiVersion
+
+> Get the Windows Update Agent version. Part of external `PSWindowsUpdate` module.
+> This command can only be run under PowerShell.
+> More information: <https://github.com/mgajda83/PSWindowsUpdate>.
+
+- Get the currently-installed Windows Update Agent version:
+
+`Get-WUApiVersion`
+
+- Send the current configuration data via email (SMTP):
+
+`Get-WUApiVersion -SendReport -PSWUSettings @{SmtpServer="{{smtp_server}}"; Port={{smtp_port}} From="{{sender_email}}" To="{{receiver_email}}"}`