feat(module): Force new dependencies to be devDependencies (if it's in a specific list)

[gxres042]

🔗 Linked issue

#454

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ 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 PR makes some changes to the module add directive: it detects a specific list of npm dependencies when adding them, and if the npm dependency to be installed is in that list, it will be installed as a development dependency.

While Nuxt will extract what is needed into the final build product, dependencies like @nuxt/eslint should not be installed as “dependencies” but as “devDependencies” in the original meaning of dependencies and devDependencies. Hence the PR.

It's not a good practice to write a dead list inside the module add function, but I haven't come up with a perfect way to do it at this stage either.