Is your feature request related to a problem? Please describe.

Currently, the written documentation (features, shortcuts, how to build a plugin,...) is laying inside radareorg/cutter. While currently the documentation is short, we are mature and stable enough to make the first steps toward a more comprehensive documentation, and this is currently work in progress.
The upcoming documentation will likely contain more pages and text, in addition to dozens of images and screenshots. There is no need that all this data will be on Cutter repository.

Describe the solution you'd like

Move all the documentation, except the API docs, to radareorg/cutter.re