fix: nuxt module installation

[selemondev]

🔗 Linked issue / Discussion

Issue: #130

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• [x] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [ ] 👌 Enhancement (improving an existing functionality like performance)
• [ ] ✨ New feature (a non-breaking change that adds functionality)
• [ ] 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• [ ] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This pull request is intended to fix issue #130 by refactoring the getInstallationCommand function by removing the devFlag since every module that is compatible with Nuxt 3 should be installed as a dev dependency rather than a regular dependency.

📝 Checklist

• [x] I have linked an issue or discussion.
• [ ] I have updated the documentation accordingly.