Add support for Dadamachines Doppler Board (5k)

[DatanoiseTV]

It would be fantastic to have bitstream export support with the right pinmapping for doppler.
https://github.com/dadamachines/doppler/blob/master/hardware/doppler-quickstart_print.pdf
https://github.com/dadamachines/doppler/blob/master/hardware/dadamachnes-doppler-schematic.pdf

[cavearr]

Hello! I am reorganizing the issues, trying to give more visibility and be able to better organize and prioritize the work and my roadmap (I will publish it very soon), I am converting some issues that are new feature requests as ideas on Github discussions.

Thanks for understanding.