* feat: add native balance in StorageChanges This will be used by the next update of DCI to properly track native balance for all the contract that it's indexing. Also added a performance optimization, we now ignore slot updates if the value after the transaction is the same than before. * docs: add docs on how to generate test assets --------- Co-authored-by: zizou <111426680+flopell@users.noreply.github.com>