feat(安装系统): 添加应用启动器并更新安装路径

添加新的应用启动器程序(app.lua)用于从/app目录运行应用
将包安装路径从/rom改为/app目录
更新安装器版本号至0.3.6 Beta 2
确保/app目录在安装过程中自动创建

data/computercraft/lua/rom/programs/app.lua

@@ -0,0 +1,51 @@
+-- app.lua - Application launcher for LeonOS
+
+local function show_help()
+  print("Usage: app <program_name> [arguments]")
+  print("Runs an application from the /app directory")
+  print("")
+  print("Options:")
+  print("  --help, -h    Show this help message")
+end
+
+local function main(args)
+  if #args == 0 or args[1] == "--help" or args[1] == "-h" then
+    show_help()
+    return
+  end
+
+  local program_name = args[1]
+  local program_args = {}
+  
+  -- 提取程序参数
+  for i=2, #args do
+    table.insert(program_args, args[i])
+  end
+  
+  -- 构建程序路径
+  local program_path = fs.combine("/app", program_name)
+  
+  -- 检查程序是否存在
+  if not fs.exists(program_path) then
+    -- 尝试添加.lua扩展名
+    program_path = program_path .. ".lua"
+    if not fs.exists(program_path) then
+      print("Error: Application '" .. args[1] .. "' not found in /app directory")
+      return
+    end
+  end
+  
+  -- 运行程序
+  print("Running application: " .. program_name)
+  local success, error_msg = pcall(function()
+    shell.run(program_path, table.unpack(program_args))
+  end)
+  
+  if not success then
+    print("Error running application: " .. error_msg)
+  end
+end
+
+-- 运行主函数
+local args = {...}
+main(args)

data/computercraft/lua/rom/programs/pkg.lua

@@ -134,9 +134,15 @@ local function install_package(pkg_name, options)
 
   -- 安装文件
   print("Installing version: " .. latest_version)
+  -- 确保app目录存在
+  local app_dir = "/app"
+  if not fs.exists(app_dir) then
+    fs.makeDir(app_dir)
+  end
+  
   for _, file_path in ipairs(meta.files or {}) do
     local src = fs.combine(version_path, file_path)
-    local dest = fs.combine("/rom", file_path)
+    local dest = fs.combine(app_dir, file_path)
     
     -- 确保目标目录存在
     local dest_dir = fs.getDir(dest)

installer.lua

@@ -1,5 +1,5 @@
 -- LeonOS installer
-local INSTALLER_VERSION = "0.3.6 Beta 1"
+local INSTALLER_VERSION = "0.3.6 Beta 2"
 local DEFAULT_ROM_DIR = "/leonos"
 
 print("Start loading LeonOS installer ("..INSTALLER_VERSION..")...")
@@ -150,6 +150,12 @@ local cache_dir = "/packages/cache"
 if not fs.exists(cache_dir) then
   fs.makeDir(cache_dir)
 end
+
+-- 确保应用目录存在
+local app_dir = "/app"
+if not fs.exists(app_dir) then
+  fs.makeDir(app_dir)
+end
 for i=#to_dl, 1, -1 do
   local v = to_dl[i]
   if v.type == "tree" then