updated some mechanics in the siege eent
new particle strings draw from the stone tot he zombie on spawn
zombies will be inactive until the soul flame string reaches them at which point they will become active and chase the player

new drops mechanic to add a custom crop and chance of drop to siege zombies this can be configured in the config

new siege end mechanic
siege zombies will be struck by lightning and removed at the end of a siege this can be enabled/disabled in the config
siege stone will blow up with tnt at the end of a siege event this can also be disabled or enabled via the cinfig

new config nodes:
explode: false
strike: true
drop: DIAMOND
drop_chance: 100