Register-PSRepository -Default failed inside the legacy nuget.exe provider
with "Missing option value for: '-source'" on the hosted windows-2022 image,
leaving PSGallery unregistered so the subsequent Set-PSRepository threw
"No repository with the name 'PSGallery'".
Prefer Microsoft.PowerShell.PSResourceGet (bundled with PowerShell 7.4+),
which has PSGallery registered by default and avoids that code path; fall
back to PowerShellGet with an explicit NuGet-provider bootstrap only when
PSResourceGet is unavailable.
Co-authored-by: Orca <help@stably.ai>
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