Improve panic capture dumps

[tauraamui]

The panic capture writes should probably be prefixed with some kind of timestamp for easier tracking of issues.

[tauraamui]

Turns out this is pretty hard to do..

#include <fcntl.h>

fn C.open(const_pathname &char, flags int, mode int) int

fn persist_stderr_to_disk() {
    fd := C.open(c'lilly.panic.log', C.O_CREAT | C.O_WRONLY | C.O_APPEND, 0o666)
    C.dup2(fd, C.STDERR_FILENO)
}

is how the panic invocation currently gets captured we just tell the proc to redirect stderr to the file lilly.panic.log, and that's it. I am unsure at this time how to per panic dump to prefix the unknown sized data being frantically written to disk before termination with a timestamp. This will need further investigation as a nice to have. For now though I don't want to waste any more time on this so it's going into On Hold.