Fix PowerShell script: use Write-Output and remove non-existent script reference

[Copilot]

Summary

• What: Fix scripts/regenerate_pnpm_lock.ps1 to use proper PowerShell cmdlets and remove broken validation reference.
• Why: Write-Host should not be used for informational output in scripts meant for programmatic use; referenced validation script check_pnpm_lock_yaml.py does not exist.

Changes

• Replace all Write-Host calls with Write-Output (lines 1-9)
• Remove reference to non-existent scripts/check_pnpm_lock_yaml.py
• Fix quote escaping in git commit example (use single quotes)

# Before
Write-Host "Done. To validate the lockfile run:"
Write-Host "  python scripts/check_pnpm_lock_yaml.py pnpm-lock.yaml"

# After
Write-Output "Done. Commit the changes with:"
Write-Output "  git add pnpm-lock.yaml && git commit -m 'chore: regenerate pnpm-lock.yaml'"

Migration steps

N/A - direct fix to existing script

Testing

• Manual: Verified PowerShell syntax and Write-Output usage
• Automated: CodeQL scan passed with no alerts

Rollback plan

Single-file change; revert commit if issues arise.

Checklist

• Write-Host replaced with Write-Output
• Non-existent script reference removed
• Quote escaping corrected
• CodeQL scan passed

Reviewers

• @73junito

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[73junito]

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[Copilot]

Pull request overview

This PR fixes a PowerShell script by replacing inappropriate Write-Host calls with Write-Output and removing a reference to a non-existent validation script.

Changes:

• Replaced Write-Host with Write-Output for proper PowerShell output handling
• Removed broken reference to non-existent check_pnpm_lock_yaml.py script
• Simplified output instructions with corrected quote usage

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