Ability to use custom remark/rehype plugins and disable included ones

[felixsanz]

Is your feature request related to a problem?

Yes. Right now you can't disable default plugins and can't include new ones or configure existing plugins.

Describe the solution you'd like

Ability to control plugins

Describe alternatives you've considered

None, there is no alternative sadly

Additional context

No response

[manucorporat]

would u be up to try make a PR? we will be happy to merge