Try to build and run network based Zephyr applications for SAM E70

I suggest starting with this platform, as it's well supported by both Renode and Zephyr.

Zephyr's repo is here: https://github.com/zephyrproject-rtos/zephyr/

Docs: https://docs.zephyrproject.org/latest/getting_started/index.html

Learn to build it with the `west` tool and try to run it in Renode.