Add MFA Window Notification Message

[Atreidae]

Added a notification message to New-AsBuiltReport to advise users of a potential hidden window when using MFA

Description

Added a new Write-Host prompt when the $MFA variable is set, displays a message to encourage the user to look for an MFA window that may have appeared underneath the current window.

Related Issue

#45

Motivation and Context

Provides user feedback for PowerShell modules that don't launch their MFA window as Modal

How Has This Been Tested?

Tested in VsCode, PsISE and Windows Terminal against my own module.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING page.

[Atreidae]

FYI, the Contributing link in the PR template points to the GitHub Carrer page as it's a relevant link.