🧹 Refactor duplicated error-handling pattern in script.ps1

[Cylae]

🎯 What: Introduced a helper function Invoke-NativeCommand in script.ps1 that executes native commands, redirects 2>&1 to Out-Null, and checks $LASTEXITCODE. Refactored Resolve-AndUpdate to use Invoke-NativeCommand.

💡 Why: Reduces repetitive error-handling boilerplate across gh and git command executions, improving codebase maintainability and readability.

✅ Verification: Verified script syntax using PowerShell script block parsing, validated helper execution with mock command blocks, ran script dry-run with a mock gh CLI environment, and completed automated code review.

✨ Result: Cleaned up duplicated error-checking code in Resolve-AndUpdate.

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PR created automatically by Jules for task 2275324870744338464 started by @Cylae

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