Copy extension to device type untested

[LHBL2003]

Hello @jasonyates

I would like to support you with this basic framework. To implement a documentation for device types.

It has not been tested, as I would need to see how to create plugins first.

But since your programme is clearly structured. It is easy to see which parts you have to copy.

I have therefore tried to prepare as much as possible without testing and checking.

Maybe it will motivate you to make the documentation for Device Type possible?

Thanks a lot :)

Otherwise I'll have to see how it all works :D