feat: Add nuxt-toc module

[hanyujie2002]

🔗 Linked issue

resolves #1076

❓ 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

Nuxt module for table of contents (TOC) component in Nuxt Content projects.

[atinux]

Hi @hanyujie2002

Is it required that the nuxt-toc component does data fetching as well? This can slow down the application.

I would suggest that it can get the toc as prop