createSimulation auth0 client_id vs clientId

[jbolda]

createSimulation expects a clientId, but it seems there is prior art to client_id and we may want to consider migrating.

the auth0 config uses client_id and it is a source of bugs (I've done it) by passing in clientId and not client_id. I think I would rename ours to client_id and be done with it.

reference: #114 (comment)

[dagda1]

I think we need better typing around config in general

export interface SimulationOptions {
  options?: Record<string, unknown>;
  services?: Record<string, {
    port?: number;
  }>
}

options?: Record<string, unknown> does not offer much to keep someone on the straight and narrow

[jbolda]

Should be resolved in #304.