Port PackSync baseline to NeoForge 1.21.1#2

iceBear67 with Copilot wants to merge 4 commits into

mastersaltedfishclub/packsync:masterfrom

copilot/create-1211-neoforge-portsaltedfishclub/packsync:copilot/create-1211-neoforge-portCopy head branch name to clipboard