🌱 (chore): wrap config parsing and validation errors with contextual messages

[kersten]

This change updates several pkg/config files to ensure consistent use of error wrapping via fmt.Errorf with %w. This improves debugging and traceability by providing more context when errors occur, especially in scenarios involving file I/O and scaffolding.

The goal is to enforce best practices across the codebase for error handling, making logs and failure points easier to diagnose.

No functional changes are introduced.

[k8s-ci-robot]

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[camilamacedo86]

/ok-to-test
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: camilamacedo86, kersten

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