Add support to ChibiOS

[patrickelectric]

Describe the feature

It would be nice to have an example using chibios, since it support a huge range of boards. In my case, no backend support the STM32h563, only chibios.

[bjsowa]

In my case, no backend support the STM32h563, only chibios.

What about FreeRTOS-Plus-TCP? That's the MCU I originally wrote this port for.

Also, I've never heard of ChibiOS but from what I read, it only provides HAL and RTOS, you still need a network stack on top of it.