feat(updater): 重写并增强更新器功能

重构更新器代码，增加错误处理和进度显示
添加版本检查、JSON库加载和文件下载功能
改进用户界面和失败安全机制

data/computercraft/lua/bios.lua

@@ -1,4 +1,4 @@
-_G._HOST = _G._HOST .. " (LeonOS 1.0.0)"  
+_G._HOST = _G._HOST .. " (LeonOS 1.0.1)"  
 local fs = rawget(_G, "fs")
 
 _G._RC_ROM_DIR = _RC_ROM_DIR or (...) and fs.exists("/leonos") and "/leonos" or "/rom"
@@ -32,7 +32,7 @@ local rc = {
   _VERSION = {
     major = 1,
     minor = 0,  
-    patch = 0
+    patch = 1
   },
   queueEvent  = pull(os, "queueEvent"),
   startTimer  = pull(os, "startTimer"),

data/computercraft/lua/rom/programs/wget.lua

@@ -37,6 +37,7 @@ if args[1] == "run" then
   if not _G.colors then _G.colors = require("colors") end
   if not _G.textutils then _G.textutils = require("textutils") end
   if not _G.shell then _G.shell = require("shell") end
+  if not _G.http then _G.http = require("http") end
 
   -- 执行下载的代码
   local func, err = load(data, "=<wget-run>", "t", _G)