KC868-AIO User guide and other docs

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if you want to use home assistant by ESPHome, here is yaml file: https://www.kincony.com/forum/showthread.php?tid=2736
if you want to use KCS firmware, here is online guide: https://www.kincony.com/esp32-kcsv2-firmware.html
here is video tour of KC868-AIO integrate to home assistant: https://youtu.be/cEaZAF2YGCo