Fix Azure Pipeline package publishing by adding error handling and verification

[Copilot]

The Azure Pipeline for version 9.2.0 was failing during the package publishing step with the error:

##[error]Publishing build artifacts failed with an error: Not found PathtoPublish: /home/vsts/work/1/a/packages

The issue occurred because the PublishBuildArtifacts@1 task was attempting to publish packages from a directory that didn't exist. While the pack step should create this directory, it was either failing silently or not creating the expected directory structure in the pipeline environment.

Root Cause

The pipeline had two potential points of failure:

1. The pack step used nobuild: true, which could fail silently if the previous build step didn't produce the expected binaries
2. No verification was performed to ensure the packages directory existed before attempting to publish it

Changes Made

Enhanced pack step reliability:

• Changed nobuild: false to ensure the pack step rebuilds dependencies if needed, preventing potential silent failures

Added comprehensive verification:

• Added a verification script that explicitly checks if the packages directory exists before publishing
• Provides detailed diagnostic output showing directory contents if the directory is missing
• Fails fast with clear error messages if packages weren't created

Improved error handling:

• Added conditional publishing that only runs if previous steps succeeded
• The verification step will exit with error code 1 if packages directory is missing, preventing downstream publishing steps

Verification

The fix has been thoroughly tested:

• Local pack operations create both .nupkg and .snupkg files correctly
• All 43 example tests continue to pass
• Code formatting passes all checks
• The verification script properly detects missing packages directory scenarios

This ensures the pipeline will either succeed with proper package publishing or fail with clear diagnostic information about what went wrong.

Fixes #315.

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