NeoPixelBus with Support for ESP-IDF

How to get https://github.com/Makuna/NeoPixelBus working with ESP-IDF

Review the files in this repo;

• NeoPixelBus.h is a copy of the one on NeoPixelBus, except the includes are changed. This only supports ESP32 with RMT.
• Arduino.h are the missing Arduino pieces.