windows/*: add PowerShell commands and aliases (#11227)

* windows/*: add PowerShell commands and aliases

* clear-host, new-item, remove-item: fix style

* psversiontable, remove-item: fix style

---------

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

pages/windows/get-help.md

@@ -0,0 +1,37 @@
+# Get-Help
+
+> Display help information and documentation for PowerShell commands, aka. cmdlets.
+> This command can only be run through PowerShell.
+> More information: <https://learn.microsoft.com/powershell/module/microsoft.powershell.core/get-help>.
+
+- Display general help information for a specific cmdlet:
+
+`Get-Help {{cmdlet}}`
+
+- Display a more detailed documentation for a specific cmdlet:
+
+`Get-Help {{cmdlet}} -Detailed`
+
+- Display the full technical documentation for a specific cmdlet:
+
+`Get-Help {{cmdlet}} -Full`
+
+- Print only the documentation for a specific parameter of the cmdlet (use `*` to show all parameters), if available:
+
+`Get-Help {{cmdlet}} -Parameter {{parameter}}`
+
+- Print only the examples of the cmdlet, if available:
+
+`Get-Help {{cmdlet}} -Examples`
+
+- List all available cmdlet help pages:
+
+`Get-Help *`
+
+- Update the current help and documentation knowledge base using `Update-Help`:
+
+`Update-Help`
+
+- View an online version of cmdlet documentation in the default web browser:
+
+`Get-Help {{cmdlet}} -Online`