Support Shelley-era genesis block addresses

[SebastienGllmt]

To support custom networks, people will want to specify starting addresses in the genesis block using Shelley style addresses (ex: bloxbean/yaci-devkit#29)

One way this can be supported is by having these addresses specified inside the Shelley genesis block itself (this is a feature supported by Cardano node itself. It's just that on mainnet this list is empty: https://book.play.dev.cardano.org/environments/mainnet/shelley-genesis.json )

If we want to go that direction, then we'll have to support this system in Carp and properly add the UTXO entries during era switching

Note: this is partially a continuation of #187