pdcl-12665: help users understand better when they have a potential n…

[brenthosie]

…ame conflict with an extension package in another org.

Description

output to the console when the error code invalid-name is returned from the API that the name of the extension package is likely in use by another extension package in another org.

Related Issue

Motivation and Context

It enables debugging uploader issues to go smoother

How Has This Been Tested?

1. testing on @next tag on npm
2. adding unit test

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Patch fix (non-breaking change that doesn't change overall functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.