Support Nuxt 3

[harlan-zw]

Hey :wave: It looks like this module hasn't been updated for Nuxt 3. In an effort to improve the developer experience of modules, I've updated the module to clarify that it only supports Nuxt 2.

If Nuxt 3 support is added it will be moved to the https://github.com/nuxt-modules organisation.

@codebender828 Is Nuxt 3 support something you have planned? If not, perhaps we can archive this module?

Please let us know and thanks for your work!

[acelletti]

@harlan-zw Seeing as this module seems currently unmaintained, I have created a new package to support Nuxt 3: https://github.com/acelletti/nuxt-mdx

What is the criteria for which modules get added to the nuxt-modules org?