simulation params errors are ignored

[MarshallAsch]

(Mostly a comment to my self for when I take over this codebase)

In the following code block where the cli parameter are parsed and an ok result is passed back:

rhpman-sim/main.cc

Line 132 in 690e9c6

std::tie(params, ok) = SimulationParameters::parse(argc, argv);

This ok value is never used and ignored. The simulation will still run using the potentially invalid parameters.

If the parameters have an issue and fail to be parsed correctly the experiment should terminate with an error code.