1.21.4-0.23.2-sakura.2

• feat: Japanese lang file thanks to @co-91
• update build.gradle for modern Gradle versions
• various crash mitigation functions, added primarily for referenced Vanilla GUI functions (Edge Case items)
• various fixes for getNbtInventory workflows with Villagers, etc
• introduces EquipmentUtils from the snapshot branch in response to Vanilla changes
• various code cleanups related to NbtUtils/Vec3d/Vec3i/Color4f and staged a few Deprecated tags for moving util functions.

NOTE: This release formally ends my back port support for 1.21 - 1.21.3, besides critical bugs. It makes no sense to maintain 4 versions of 1.21.x with the snapshot now a thing.