Zombified Piglin restore anger loot

Restores the original Zombified Piglin loot mechanic like it was in 1.21 ## Configuration ### Gamerule ``spawn_zombified_piglin_always_with_sword_on_magma_block`` Forces Zombified Piglins to **always** spawn with a sword on magma blocks. The default is ``false``. _This gamerule exists because_ * _starting with 1.21.11 Zombified Piglins can spawn with a spear:_ * _Piglins with spears can hit each other while attacking, which in turn causes retaliation/infighting and therefore lowering the overall effectiveness of farms_ * _The performed charge attack requires a lot more calculations when compared to a "normal" sword attack_ * _most gold farms use magma blocks anyway_ * _all other gameplay aspects are unaffected_ ## Motivation/Why does this mod exist? Gold farms got [significantly nerfed](https://bugs.mojang.com/browse/MC-56653) in [25w02a](https://minecraft.wiki/w/Java_Edition_25w02a). See also: [More details, comparisons and arguments](https://github.com/litetex-oss/mcm-zombified-piglin-restore-anger-loot/blob/dev/MOTIVATION.md)