Document `-Paged` parameter of `Get-Help`

[adityapatwardhan]

Summary of the new document or enhancement

• List of articles that need to be updated: https://github.com/MicrosoftDocs/PowerShell-Docs/blob/staging/reference/7.1/Microsoft.PowerShell.Core/Get-Help.md
• New articles that need to be created:
• Link(s) to related code PR(s) in the PowerShell/PowerShell repo: Add paging support to Get-Help PowerShell/PowerShell#13374
• Link(s) to related issue(s) in the PowerShell/PowerShell repo:

Description of what changed

Added new parameter for adding paging support to Get-Help which allows the use to see the help content on an alternate screen buffer. It also allows scrolling using arrow keys.