basicstation: initial check-in

basicstation: initial check-in

(LoRa) Basicstation is an implementation of a LoRa packet forwarder and is
intended to be run on the host of a LoRa-based gateway. Basicstation forwards
RF packets recieved by a concentrator to a LoRaWAN network server (LNS).
It also transmits RF packets received from the LNS to one or multiple LoRa
end devices. Further information: https://lora-developers.semtech.com/build/
software/lora-basics/lora-basics-for-gateways

Signed-off-by: Marcus Schref <mschref@web.de>