execOrDie

[gam6itko]

if any exec fails - job fails too.

Fixed #17

[gam6itko]

@TomasVotruba Hello, can you review this PR please

[alinceDev]

@TomasVotruba please we need this PR

[Copilot]

Pull Request Overview

This PR introduces a new execOrDie function to handle command execution failures more consistently by automatically terminating the script when any exec command fails. The change addresses issue #17 by replacing direct exec calls with execOrDie throughout the codebase.

• Adds execOrDie function that checks exit codes and terminates on failure
• Replaces all exec calls with execOrDie for consistent error handling
• Removes manual exit code checking logic that is now handled by the new function

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[gam6itko]

Hallelujah