[Feature Request] Add a PlainText & Markdown exporter

[bertoost]

Thanks for this!

Would be great to have more exporterrs than HTML only.
Maybe will try to create one :-)

[DamienHarper]

@bertoost Thanks for the feedback and sorry for this very late response. Did you manage to build your own exporter?

[bertoost]

@DamienHarper maybe I will create it and make a PR on this repository then!