Add root check

[jeevithakannan2]

Type of Change

• [ ] New feature
• [x] Bug fix
• [ ] Documentation update
• [ ] Refactoring
• [ ] Hotfix
• [x] Security patch
• [ ] UI/UX improvement

Description

• Thanks @cartercanedy and @adamperkowski for helping out !!
• Add root check and warn users about running as root
• Uses nix crate

Testing

• Undergoing. Most of the scripts are tested with root, should be okay !!

Issues / other PRs related

• Resolves #816

Checklist

• [x] My code adheres to the coding and style guidelines of the project.
• [x] I have performed a self-review of my own code.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [ ] I have made corresponding changes to the documentation.
• [x] My changes generate no errors/warnings/merge conflicts.