docs(markdown): add info to the complete MDC docs

[maximepvrt]

Every time, I look for this link to find the full MDC syntax documentation 😅

For example, the current content markdown page doesn’t explain inline blocks, nested blocks, etc.

And it’s this page that is currently given as the MDC doc here: https://github.com/nuxt-content/mdc?tab=readme-ov-file#features

Maybe it would be better to create a dedicated documentation page for the MDC syntax on the Nuxt Content site, which would be as complete as possible, rather than spreading the documentation across multiple places as it is currently.

🔗 Linked issue

❓ 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 like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

📝 Checklist

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

[vercel]

@maximepvrt is attempting to deploy a commit to the Nuxt Team on Vercel.

A member of the Team first needs to authorize it.

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/content@3605

commit: f51a1f0

[farnabaz]

Thanks 👍

[farnabaz]

Let's keep the link for now. We will create dedicated page for MDC Syntax and Spec soon