完善系统核心功能、添加here模块

data/fz/functions/game_event/player/on_sneak.mcfunction

@@ -0,0 +1,7 @@
+# 调用者：advancements/fz:~
+
+## 调试
+execute if score fz.logger.level fz.variable.integer matches ..400 run tellraw @a [{"nbt": "fz.level.debug", "interpret": true, "storage": "fz:logger"}, {"text": "事件已触发：玩家"}, {"selector": "@s"}, {"text": "蹲下"}]
+
+## 运行事件
+function #fz:game_event/player/on_sneak