Add Billions networks (#467)

* add billions networks

* update ubuntu version

* update billions main chainid

use crypto/rand; add function get ChainID by core.ID (#466)

fix chainid for polygon zkevm cardona (#465)

Add Privado chain as a part of a core library (#463)

fix getting SchemaHash from int for short ints (#462)

Add Amoy network as a part of a core library (#461)

Add NetworkByChainID function to return network and blockchain for re…

…gistered ChainID (#460)

* Add NetworkByChainID function to return network and blockchain for registered ChainID

Add errors to register the same values to DID Method, ChainID, Networ…

…k Flag (#459)

add NewClaimFromBigInts constructor (#458)

Co-authored-by: vmidyllic <74898029+vmidyllic@users.noreply.github.com>

Custom registration (#457)

* Custom registration