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/redstone.lua

@@ -0,0 +1,88 @@
+local rc = require("rc")
+local rs = require("redstone")
+local colors = require("colors")
+local textutils = require("textutils")
+
+local args = {...}
+
+local commands = {}
+
+local sides = {"top", "bottom", "left", "right", "front", "back"}
+
+function commands.probe()
+  textutils.coloredPrint(colors.yellow, "redstone inputs", colors.white)
+  local inputs = {}
+  for i=1, #sides, 1 do
+    if rs.getInput(sides[i]) then
+      inputs[#inputs+1] = sides[i]
+    end
+  end
+  if #inputs == 0 then inputs[1] = "None" end
+  print(table.concat(inputs, ", "))
+  return true
+end
+
+local function coerce(value)
+  if value == "true" then return true end
+  if value == "false" then return false end
+  return tonumber(value) or value
+end
+
+function commands.set(side, color, value)
+  if not side then
+    io.stderr:write("side expected\n")
+    return true
+  end
+
+  if not value then
+    value = color
+    color = nil
+  end
+
+  value = coerce(value)
+  if type(value) == "string" then
+    io.stderr:write("value must be boolean or 0-15\n")
+  end
+
+  if color then
+    color = coerce(color)
+    if type(value) == "number" then
+      io.stderr:write("value must be boolean\n")
+    end
+
+    if not colors[color] then
+      io.stderr:write("color not defined\n")
+    end
+
+    rs.setBundledOutput(side, colors[color], value)
+
+  elseif type(value) == "boolean" then
+    rs.setOutput(side, value)
+
+  else
+    rs.setAnalogOutput(side, value)
+  end
+
+  return true
+end
+
+function commands.pulse(side, count, period)
+  count = tonumber(count) or 1
+  period = tonumber(period) or 0.5
+
+  for _=1, count, 1 do
+    rs.setOutput(side, true)
+    rc.sleep(period / 2)
+    rs.setOutput(side, false)
+    rc.sleep(period / 2)
+  end
+
+  return true
+end
+
+if not (args[1] and commands[args[1]] and
+    commands[args[1]](table.unpack(args, 2))) then
+  io.stderr:write("Usages:\nredstone probe\n"..
+    "redstone set <side> <value>\nredstone set <side> <color> <value>\n"..
+    "redstone pulse <side> <count> <period>\n")
+end