update 2.0 files

data/fz/functions/load.mcfunction

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+#如果未安装且未卸载则安装
+execute unless data storage fz.installed {installed:1b} unless data storage fz.installed {installed:0b} run function fz:install
+#如果版本正确且已安装则开始运行
+execute if data storage fz {version:Alpha-2.0.0.2} if data storage fz.installed {installed:1b} run function fz:start
+#如果版本不符则更新
+execute unless data storage fz {version:Alpha-2.0.0.2} run function fz:update
+#输出版本信息
+tellraw @a [{"text": "FZ's Datapack-"},{"nbt":"version","storage":"fz"},{"nbt": "snapshot", "storage": "fz"}]