Article on wrapping C libraries in Nim

[adokitkat]

I would like to automatize creating a wrapper for ESP-IDF (framework for ESP32 
programming based on FreeRTOS and full of macros). I would like to achieve a 
similar thing to [nesper](https://github.com/elcritch/nesper), but 
automatically generated so it doesn't have to be manually checked and fixed 
every release when API changes and could wrap any fork of ESP-IDF as well. It 
would make sense to generate each header file to a different nim file so it 
will have the same structure.