Standardize behavior/precedence of flags

[dluman]

Currently, when Cullen Doyle (@cullendoyle28) tests romulan in workflows:

• specifying --timeout by itself doesn't do anything or, if it does the program still defaults to 500 max cycles
• we should decide whether or not:
  • --max-cycles and --timeout are exclusive (I think so; we shouldn't provide both)
  • --timeout independent of --max-cycles should just timeout
  • providing no flags runs an infinite loop (unless we see a stop)