Add `.setPrefix()` method to `lib/shell` and related files, and supports BITS / 명령행 접두어 및 BITS 지원

[gnh1201]

Summary

1. Add .setPrefix() method to lib/shell
2. Add supports BITS #119
3. Add .sonarcloud.properties file
4. Fix broken file paths
5. Clean up an unused code blocks

Related links

• https://github.com/gnh1201/welsonjs/issues/119
• https://chatgpt.com/share/6083bfb6-7d4e-49ac-a971-85bfd338e38b

[sonarcloud[bot]]

Quality Gate failed

Failed conditions
B Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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