copied and adapted example from mdk, added init and config uart

having a program that runs on esp32-c3

Should initilize and config uart according to technical reference

Transmitting a simple message to test our if we get it

src/reading-writing-registers/main.c

-// Copyright (c) Charles Lohr
-// All rights reserved
-
 #include <mdk.h>
 #include "esp32-c3-register-interface.h"