README updates
README updates

addresses why k2 and to use k2cli first

samsung-cnct/kraken-lib,samsung-cnct/kraken-lib,samsung-cnct/k2,leahnp/k2,samsung-cnct/kraken-lib,leahnp/k2,samsung-cnct/k2,yenicapotediaz/k2,alejandroEsc/k2,alejandroEsc/k2,yenicapotediaz/k2