[Feature]: Palworld: Graceful stop using shutdown command

[armgadge]

User story

As a server admin, I want to stop the server gracefully so that using shutdown command.

Game

Palworld

Linux distro

No response

Command

command: stop

Further information

I found one of the devs answered the question about how to shutdown the Palworld server.

Devs answered:

• It is recommend to use the shutdown command to avoid any risk of world data corruption
• They think kill term and SIGINT(CTRL+C) are doing same behavior, but it's likely has not been handled as terminate processing

Source: Pocketpair Official Discord (Written in Japanese)
https://discord.com/channels/505994577942151180/1197832028570271744/1225335612572303420

To issue the shutdown command, we have to use RCON or REST API, so I want to suggest to make stop command customizable so that call curl command.

Reference: shutdown command using REST API
https://tech.palworldgame.com/api/rest-api/shutdown/