Fix 1794 by handling if prerelease is supplied as boolean too

[o-l-a-v]

PR Summary

• Fix Install-PSResource -RequiredResourceFile ignores the prerelease key if set to $true in a psd1 file #1794 by handle prelease if a boolean too.
  • Fix and context was suggested to me by Copilot.
• Applied some quick fixes suggested by C# VSCode extension.

Tested like so:

# Build
& '.\build.ps1' -Clean -Build -BuildFramework net472

# Import built DLL
Import-Module -Name '.out\Microsoft.PowerShell.PSResourceGet\Microsoft.PowerShell.PSResourceGet.dll'

# Test issue from #1794
$DebugPreference = 'Continue'; Install-PSResource -TrustRepository -RequiredResource @{
    'PrereleaseTest' = @{
        'repository' = 'PSGallery'
        'prerelease' = $true
        'Scope'      = 'CurrentUser'
    }
} -WhatIf

PR Context

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge and is not Work in Progress.
  • If the PR is work in progress, please add the prefix WIP: or [ WIP ] to the beginning of the title (the WIP bot will keep its status check at Pending while the prefix is present) and remove the prefix when the PR is ready.
• Breaking changes
  • None
  • OR
  • Documentation needed
    • Issue filed:
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
  • OR
  • I have considered the user experience from a tooling perspective and enumerated concerns in the summary.

[o-l-a-v]

Maybe a new test and test module should be added? Like the test module by Justin Grote:

• https://www.powershellgallery.com/packages/PrereleaseTest

Only Install-PSResource has these parameters though, ref:

• Find-PSResource and Save-PSResource does not have -RequiredResource and -RequiredResourceFile #1844

Would be nice if Find-PSResource had them too.