refactor: use gorich/helperr instead of internal/sclerr

[murfffi]

use gorich/helperr instead of internal/sclerr;
also refresh deps

[gemini-code-assist]

Summary of Changes

Hello @murfffi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request streamlines the project's error handling by migrating from a custom internal utility to a standardized external library, gorich/helperr. Concurrently, it updates several Go module dependencies, ensuring the project benefits from the latest features and bug fixes.

Highlights

• Refactor Error Handling: The internal sclerr package has been replaced with the external gorich/helperr library for CloseQuietly functionality, standardizing error handling utilities.
• Dependency Updates: Several Go module dependencies, including github.com/ansel1/merry/v2 and github.com/stretchr/testify, have been updated to their latest versions.

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[gemini-code-assist]

Code Review

This pull request refactors the codebase to use gorich/helperr instead of the internal sclerr package for quietly closing resources, and also updates other dependencies. The change is a simple replacement, but the use of CloseQuietly on file writers introduces risks of silent failures and data corruption. I've identified two instances in download/download.go where this is problematic and provided feedback for safer error handling.