Hi! I've made this plugin a couple of weeks ago, when I saw this thread. But it's functionality is so basic, so I didn't want to upload it, I thought I can make a pull request for Nukkit to include these commands. I think, I will do it some day, but for now you can use this plugin. I won't publish it in resources here nor at official site, since it's not ideal. It has two commands: /hunger [on/off] and /sethunger <hungerlevel>.