[1.19.2] [Feature] Allow UnclaimAll to work for offline users claims

[DaemonUmbra]

MC Version: 1.19.2
SU Version: 2.8.7

UnclaimAll currently uses the Vanilla player selector which only queries for online players, which can be used maliciously in specific circumstances (or if used at all thanks to #9).

(Will look into this myself, posting this for tracking)