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/apis/vector.lua

@@ -0,0 +1,76 @@
+-- rc.vector
+
+local vector = {}
+local Vector = {}
+
+function Vector:add(o)
+  return vector.new(self.x + o.x, self.y + o.y, self.z + o.z)
+end
+
+function Vector:sub(o)
+  return vector.new(self.x - o.x, self.y - o.y, self.z - o.z)
+end
+
+function Vector:mul(m)
+  return vector.new(self.x * m, self.y * m, self.z * m)
+end
+
+function Vector:div(m)
+  return vector.new(self.x / m, self.y / m, self.z / m)
+end
+
+function Vector:unm()
+  return vector.new(-self.x, -self.y, -self.z)
+end
+
+function Vector:dot(o)
+  return (self.x * o.x) + (self.y * o.y) + (self.z * o.z)
+end
+
+function Vector:cross(o)
+  return vector.new(
+    (self.y * o.z) - (self.z * o.y),
+    (self.z * o.x) - (self.x * o.z),
+    (self.x * o.y) - (self.y * o.x))
+end
+
+function Vector:length()
+  return math.sqrt((self.x * self.x) + (self.y * self.y) + (self.z * self.z))
+end
+
+function Vector:normalize()
+  return self:div(self:length())
+end
+
+function Vector:round(tolerance)
+  tolerance = tolerance or 1
+  local squared = tolerance * tolerance
+  return vector.new(
+    math.floor(self.x + (tolerance * 0.5)) / squared,
+    math.floor(self.y + (tolerance * 0.5)) / squared,
+    math.floor(self.z + (tolerance * 0.5)) / squared)
+end
+
+function Vector:tostring()
+  return string.format("%d,%d,%d", self.x, self.y, self.z)
+end
+
+function Vector:equals(o)
+  return self.x == o.x and self.y == o.y and self.z == o.z
+end
+
+Vector.eq = Vector.equals
+
+local vect_mt = {
+  __index = Vector
+}
+
+for k, v in pairs(Vector) do
+  vect_mt["__"..k] = v
+end
+
+function vector.new(x, y, z)
+  return setmetatable({x = x or 0, y = y or 0, z = z or 0}, vect_mt)
+end
+
+return vector