Initial work on making player data read/update asynchronous#62

MATRIX-feather wants to merge 6 commits into1.21.11/featureNiFeather/FeatherMorph:1.21.11/featurefrom

1.21.11/feature-async-storageNiFeather/FeatherMorph:1.21.11/feature-async-storageCopy head branch name to clipboard