Add a way to execute code and inspect stack

[igamigo]

Related to 0xPolygonMiden/miden-base#1161
Usually, Miden transactions are expected to modify the account's state in some way, but there are cases where users are interested in executing arbitrary code and reading the stack state after it. This implies not executing the epilogue and just returning after the user's code.
After changes are implemented to TransactionExecutor, we should provide a client API to do this, and a CLI command that exposes it as well. In the issue, this exec command is suggested:

miden exec --account <account_id> --script <path to masm file> --inputs <path to inputs file>