initial attempt to create library for Microchip bluetooth module based on IS2020/IS2062/IS2083 chips

for modules by microchip BM20 BM23 BM62 BM64 BM83

https://www.microchip.com/wwwproducts/en/BM20 https://www.microchip.com/wwwproducts/en/BM62 https://www.microchip.com/wwwproducts/en/BM83

probably also for other also: https://www.microchip.com/wwwproducts/en/BM23 https://www.microchip.com/wwwproducts/en/BM64

here is post about uploading new setting to bm83: https://kovo-blog.blogspot.com/2021/05/bm83-how-to-s.html