Publish-PSResource -Nupkg should support multiple values and wildcards

[sdwheeler]

Summary of the new feature / enhancement

As a package publisher, I want to be able to publish multiple .nupkg files with one command. For example, I have packaged and signed multiple packages .nupkg files. I now want to provide multiple paths or a wildcard pattern to publish all .nupkg files in a folder.

Proposed technical implementation details (optional)

• The Nupkg paramater needs to be [String[]] type and have the [SupportsWildcard] attribute
  • Suggest renaming the parameter to NupkgPath
• If you support wildcards then you need to support a literal path version such as NupkgLiteralPath