SF_RykenSlimeCustomizer v3.1.10

RykenSlimeCustomizer 3.1.10 gates legacy external recipe-type probes behind the matching installed plugin, removing false InfinityExpansion class warnings on IE2-only servers while preserving Paper 26.3 validation and the Java 21 universal baseline. The Legacy suffix version scheme is replaced by the standard SF_RykenSlimeCustomizer3.1.10.jar public artifact.