custom presets

unlike being in the game, there's no "current admin" in a custom preset. so due to this you dont need to be the admin to run your own scripts in your own custom preset. instead, the restriction is: you can only ever run scripts that affect yourself, and the preset MUST be upgraded atleast once

• player.give, player.teleport, player.launchForward only work if the target is you, inside your own preset world
• world.spawnEntity, world.playSound only work inside your own preset world
• Katton.players.all() (and the other selectors) only ever return you