feat: 初始提交 LeonOS 实现

添加 LeonOS 的基本实现，包括：
- 核心 API 模块（colors, disk, gps, keys, multishell, parallel, rednet, redstone, settings, vector）
- 命令行程序（about, alias, bg, clear, copy, delete, edit, fg, help, list, lua, mkdir, move, paint, peripherals, programs, reboot, set, shutdown, threads）
- 系统启动脚本和包管理
- 文档（README.md, LICENSE）
- 开发工具（devbin）和更新程序

实现功能：
- 完整的线程管理系统
- 兼容 ComputerCraft 的 API 设计
- 改进的 shell 和命令补全系统
- 多标签终端支持
- 设置管理系统

data/computercraft/lua/rom/programs/devbin.lua

@@ -0,0 +1,89 @@
+-- devbin (like pastebin)
+
+if not package.loaded.http then
+  error("HTTP is not enabled in the ComputerCraft configuration", 0)
+end
+
+local http = require("http")
+local json = require("rc.json")
+local shell = require("shell")
+
+local args = {...}
+
+if #args < (args[1] == "get" and 3 or 2) then
+  io.stderr:write([[
+Usage:
+devbin put <filename>
+devbin get <code> <filename>
+devbin run <code> [argument ...]
+]])
+  return
+end
+
+local paste = "https://devbin.dev/api/v3/paste"
+local key = "aNVXl8vxYGWcZGvMnuJTzLXH53mGWOuQtBXU025g8YDAsZDu"
+
+local function get(code)
+  local handle, err, rerr = http.get("https://devbin.dev/raw/"..code)
+  if not handle then
+    if rerr then rerr.close() end
+    error(err, 0)
+  end
+
+  local data = handle.readAll()
+  handle.close()
+
+  return data
+end
+
+if args[1] == "put" then
+  local handle, err = io.open(shell.resolve(args[2]), "r")
+  if not handle then error(err, 0) end
+  local data = handle:read("a")
+  handle:close()
+
+  if (not data) or #data == 0 then
+    error("cannot 'put' empty file", 0)
+  end
+
+  local request = json.encode({
+    title = args[2],
+    syntaxName = "lua",
+    exposure = 0,
+    content = data,
+    asGuest = true
+  })
+
+  local response, rerr, rerr2 = http.post(paste, request,
+    {["Content-Type"]="application/json", Authorization = key}, true)
+  if not response then
+    local _rerr2 = rerr2.readAll()
+    if rerr2 then rerr2.close() end
+    print(_rerr2)
+    error(rerr, 0)
+    --("%q: %q"):format(rerr, (rerr2 and rerr2.readAll()) or ""), 0)
+  end
+
+  local rdata = response.readAll()
+
+  local code, message = response.getResponseCode()
+  response.close()
+  if code ~= 201 then
+    error(code .. " " .. (message or ""), 0)
+  end
+
+  local decoded = json.decode(rdata)
+
+  print(decoded.code)
+
+elseif args[1] == "get" then
+  local data = get(args[2])
+  local handle, err = io.open(shell.resolve(args[3]), "w")
+  if not handle then error(err, 0) end
+  handle:write(data)
+  handle:close()
+
+elseif args[1] == "run" then
+  local data = get(args[2])
+  assert(load(data, "=<devbin-run>", "t", _G))()
+end