Add LoRa Radio Support

[kestewart]

For Zephyr to be effective in Industrial settings, its going to need some form of LPWA (low power wide area) connectivity to be supported [1].

Others have expressed interest in seeing LoRa added to Zephyr already[2], so can it please be added to the "Future" bucket on the product roadmap to signal to interested parties that the project would welcome contributions in this area? [3]

Once there is work started, we should also consider having Zephyr become a LoRA Alliance Institutional member [4].

[1]https://www.mckinsey.com/global-themes/internet-of-things/our-insights/the-future-of-connectivity-enabling-the-internet-of-things
[2] #4569
[3] https://docs.google.com/presentation/d/1HA3Y9g4hQxsbUiCG37GvQjqF6vcKACSbKYV3d2Pswpk/edit#slide=id.g225d77f801_0_0
[4] https://www.lora-alliance.org/become-a-member

[alexanderwachter]

LoRa support is added by #18998