Added wrapper for dap_chain_cs_dag and dap_chain_cs_dag_event.
Extended API for working with datums, namely checking and getting from a datum, a datum token, if the datum has a declaration type. Issue token datum, if the datum is of the transaction type.
Added getting from datum token declaration of simple data type.
Added getting data from the emission token datum.
Added an id attribute for an object of type ChainNet to get an object of type ChainNetId.
