PNG Stalkers Safe Real Attack v9

Fixes:
- Window Peek Jester no longer instantly spawns the killer.
- Running into him still spawns the killer after a tiny grace period.
- Waiting 20 seconds still spawns the killer.
- Hidden Husk drops no rotten flesh.
- Jester uses a custom death message instead of 'slain by Husk'.
- Attacker despawns after player death.

Commands:
/function pngstalksafe:spawn/jester_window_peek
/function pngstalksafe:spawn/jester_attack
/function pngstalksafe:kill_all
/function pngstalksafe:spawn/all
/function pngstalksafe:auto/on
/function pngstalksafe:auto/off
