AnyPackage DSC resources module.
Install-Module AnyPackageDscDocumentation is located in the AnyPackage-Docs repository.
The AnyPackageDsc or AnyPackage module has to be imported before Get-DscResource or Invoke-DscResource will find the resource.
AnyPackageDsc requires types in AnyPackage and is most likely the issue with how PSDesiredStateConfiguration finds resources.
An issue has been logged and you can follow PowerShell/PSDesiredStateConfiguration#104 for updates.