[BUG][CODE] remove the panic hook / ensure that it shuts down / restarts the process

[raggi]

The panic hook is nice in that it might allow for a log entry on panic. The problem is that the reliability of this is unpredictable, because panic hooks in general are hard to make safe/sound.

It's very unsafe/unsound in almost all cases for the process to keep going after a panic, as it's possible that a panic happening can allow objects to be in a state that violates safety rules, at which point we're working from some kind of corrupt state.

In the somewhat more common case, panics will abort threads, as an example I just caught such a case which terminates the command processing thread:

2024-04-14T04:20:00.276914Z ERROR process_command{ToggleMonocle}:toggle_monocle:monocle_off: komorebi: panicked at komorebi\src\workspace.rs:998:26:
attempt to subtract with overflow panic.file="komorebi\\src\\workspace.rs" panic.line=998 panic.column=26

We should ensure that the process exits after a panic happens. We could choose to restart the process in some way, or not to, but continuing is likely to perpetuate some really tricky to track down issues.