Custom shard tiers 1.21.1#50

Draft

BradyMcd wants to merge 2 commits intowisp-forest:mainfrom

BradyMcd:Custom-shard-tiers-1.21.1

Commits on Jan 4, 2026

Added CustomShardTier logic, pre-test state
Brady McDonough
committed

Commits on Jan 10, 2026

Ported changes from 1.20.1 branch
Brady McDonough
committed