🧹 Refactor duplicated section headers into Write-SectionHeader function

[murilogiatti]

🎯 What: Introduced a new function Write-SectionHeader in CleanupAndUpdateEverything.ps1 to handle the recurring Write-Host calls for section headers. Replaced 5 duplicated string formatting instances with function calls. Also added variables for testing to ensure correct environment setup.
💡 Why: Reduces duplicate code and improves maintainability. Any future changes to the section header styling can now be made in one place.
✅ Verification: Ran pwsh -c "Invoke-Pester ./CleanupAndUpdateEverything.Tests.ps1" ensuring all 6 existing tests pass, maintaining 100% test success rate.
✨ Result: A cleaner, more readable script with refactored string logging.

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PR created automatically by Jules for task 17538443715458454452 started by @murilogiatti

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