Some Mob Battle Utils

mod adds some things for mob battles, curently it has 2 gamerules, 4 items and 1 command.

first gamerule: free for all, it makes mobs on spawn create and join new team, team is created based on registry name and UUID.

second gamerule: mod teams, makes same thing as first one but it makes teams based on mod names.

first item: FFA stick, it sets free for all gamerule to true/false.

second item: mod team stick, does same thing as FFA stick but for mod teams gamerule.

third item: No Block Destruction, it makes blocks fully imposible to break.

fourth item: Arena Stick, to use it player needs to right click on 2 different places to set area where arena should be, shift+right click to turn on arena. mobs can't leave that arena. arena borders will be rendered if player holds Arena Stick in hand.

first command:spawnrandommob, it spawns random mob on use, works with modded entities.