Identity point check during parent pub key to child pub key derivation

[satran004]

Verify if the generated child public key (from parent public key) is the identity point (0, 1). If yes, discard the child.

Please refer to this line

https://github.com/bloxbean/cardano-client-lib/blob/22c9d2338c0345e29675308eebcc07d969bd5178/src/main/java/com/bloxbean/cardano/client/crypto/bip32/HdKeyGenerator.java#L250