19 timelock stateless contract

[lolaaimar]

PR summary:

• Fixes code gen for timelock only contracts. In this case, ledger declarations and init, commit circuits are not included (stateless contract) as they are not necessary because no commitments are expected.
• Fixes tests for the case in which ledger and init, commit circuits are not present via a wrapper on the Contarct type used in Warden Simulator.
• Adds examples of timelock only inputs