ESPHome usable library for C1101/ITHO

This is mostly from https://github.com/jodur/ESPEASY_Plugin_ITHO/

Although backtracked to (amongst other forks) : https://github.com/adri/IthoEcoFanRFT / https://github.com/supersjimmie/IthoEcoFanRFT