Fixed Issue with Compress-PSResource not working when passed Relative Path to DestinationPath

[jshigetomi]

PR Summary

fixes: #1715

This pull request introduces changes to the Compress-PSResource functionality, including updates to the PublishHelper.cs file and the corresponding tests in CompressPSResource.Tests.ps1. The primary focus is on enhancing the compression process and ensuring it works correctly with both absolute and relative paths.

Enhancements to Compress-PSResource functionality:

• src/code/PublishHelper.cs: Added logic to set the outputNupkgDir to DestinationPath when the caller cmdlet is CompressPSResource. ([src/code/PublishHelper.csR297-R301](diffhunk://#diff-de173e5cd669c3f87b931f1b38ebaa7633861e9c809176f0cec1735585d68549R297-R301))

Updates to tests:

• test/PublishPSResourceTests/CompressPSResource.Tests.ps1: Added a new test case to verify the compression of a script into a .nupkg file. ([test/PublishPSResourceTests/CompressPSResource.Tests.ps1R194-R244](diffhunk://#diff-8214d34f8b6d7fd40d95dab82c9c569dd62919c12ac16e599af4255985a15cb7R194-R244))
• test/PublishPSResourceTests/CompressPSResource.Tests.ps1: Added a test case to ensure that Compress-PSResource works correctly when using relative paths for the -DestinationPath parameter. ([test/PublishPSResourceTests/CompressPSResource.Tests.ps1R194-R244](diffhunk://#diff-8214d34f8b6d7fd40d95dab82c9c569dd62919c12ac16e599af4255985a15cb7R194-R244))

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