SX123x Support

[victorfmin66]

Hello Mark, thank you for the great job you are doing with the Rnodes in particular and the reticulum project in general, I love what you accomplished so far. What do you think on implementing the SX1231 and SX1233 Semtech modules to Rnode? I think would be a good addition knowing that the SX1233 can support speeds up to 600kbps. Both SX1231 and SX1233 are pretty similar data sheet wise. I have some ESP32 and SX1231 modules ready to be tested so I can do de QA testing if necessary.

Thanks!