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/pswindowsupdate.md

@@ -0,0 +1,13 @@
+# PSWindowsUpdate
+
+> A PowerShell external module to manage Windows Update.
+> This tool provides multiple commands that all can only be run through PowerShell.
+> More information: <https://github.com/mgajda83/PSWindowsUpdate>.
+
+- Install the module using `Install-Module`:
+
+`Install-Module PSWindowsUpdate`
+
+- List all commands available under the module:
+
+`Get-Command -Module PSWindowsUpdate`