Call std::process::exit directly from CommandLineArgs.

[andriyDev]

Previously, sending an AppExit event would result in the window opening up (which can be annoying). Now, by just calling std::process:exit, we just quit right on the spot.

Note we already std::process::exit in the help flag, so this isn't much different.

[jakobhellermann]

Hm, I'm trying to remember why I did things this way. I think it had to do with the fact, that only after running the app once, the system information is initialized which would let us display the infos about which components and resources are accessed from a system. But then the graph would have to be rendered after that anyways, not in plugin::finish...

[andriyDev]

This seems to be the case in the original CLI PR, authored by another contributor. They might have more context.

Perhaps the intent is to allow other plugins to do their own CLI and then exit? This approach exits immediately. This might be less of an issue now that we're in finish.