v5.0.0 branch - build ping-pong apps

[stingdau1206]

radio.h: No such file or directory in-branch v5.0.0

[mluis1]

Please refer to #1239 for v5.0.0 branch development current status.

The ping-pong examples haven't yet been updated. That's why.

I have implemented the required updates. However I did not had the time to perform the required tests for ping-pong, tx-cw and rx-sensi examples.

If you are willing to provide feedback. Please find attached the required update patch file.
v5.0.0-non-lorawan-examples-update.patch.txt

I am moving this issue to the discussion tab as v5.0.0 branch is still a work in progress.

[mluis1]

@stingdau1206 Had you chance to give a try to the provided patch?

Would be nice to get your feedback.