Log every panic to the logfile

[raphCode]

As an extension to logging only panics in the client (#1433 (comment)), this change should log every panic, no matter if it happens in client or server.

I believe I had some sessions disappearing mysteriously without being attached, so I never saw panic traces. This should be the first step to investigate.

Example log entry:

ERROR  |zellij_utils::errors     | 2022-07-25 15:57:30.802 [main      ] [zellij-utils/src/errors.rs:94]: Panic occured:
thread: main
location: At /home/<redacted>/zellij/zellij-utils/src/ipc.rs:158:68
message: called `Result::unwrap()` on an `Err` value: Io(Os { code: 32, kind: BrokenPipe, message: "Broken pipe" })