Achievements Optimizer

• moved to multiloader code
• added config for fabric version (now required Forge Config API Port)
• refactor mixins
• added config option to skip empty stacks

• upd 1.21.4
• refactor mixins
• added config option to skip empty stacks

fixed crash

ported to mc 1.21 neoforge

ported 1.21

fix https://github.com/bigenergy/achievement-optimizer/issues/11

updated to recommended forge / new optimizations in ItemPredicate (fast matches)