add LoRa APRS Transmit Example for STM32WLx boards

[radiohound]

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[radiohound]

Here is an example for transmitting LoRa APRS for the STM32WLx boards. I've tested it for the Nucleo WL55JC2 board and Ebyte's E77 development board.

[jgromes]

I'm not convinced it is necessary to have this as a standalone example. It seems that this mainly adds the RF switching configuration. However, that's not specific to LoRa APRS, that's specific to the STM32WL module.

For this sort of configuration (pinouts of different modules etc.) we have a specific repository: https://github.com/radiolib-org/RadioBoards. For example, this is how RF switching on WM1110 is handled: https://github.com/radiolib-org/RadioBoards/blob/main/src/maintained/SeeedStudio/WM1110.h

If you could contribute the STM32WL configuration over there, that would be great!

[radiohound]

Ah, that makes sense. I'll try doing that. Thanks!

[jgromes]

Thanks! In that case I will close this PR.