feat: 引入 Lua 配置系统实现 UI 参数热更新

- 添加 Lua 5.5 库支持，包含头文件和动态链接库
- 新增 lua_config 模块，提供配置初始化、获取字符串/整型值等功能
- 创建 config.lua 配置文件，集中管理所有 UI 文本、尺寸和布局参数
- 移除原有的硬编码 config.h，将 UI 常量迁移至 Lua 配置
- 修改主窗口、对话框和回调函数，动态读取 Lua 配置值
- 更新 CMakeLists.txt，添加 Lua 库依赖和 DLL 复制步骤
- 删除过时的 Makefile，统一使用 CMake 构建

lua/config.lua

@@ -0,0 +1,71 @@
+-- PathEditor 配置文件
+-- 用于热更新 UI 参数，无需重新编译即可调整界面
+
+local config = {
+    -- 应用程序信息
+    app = {
+        name = "PathEditor",
+        name_readonly = "PathEditor (只读模式)"
+    },
+
+    -- 对话框设置
+    dialog = {
+        size = "800x800",
+        minsize = "800x800",
+        select_dir = "选择目录"
+    },
+
+    -- 列表控件设置
+    list = {
+        item_padding = "5x5",
+        backcolor = "255 255 255"
+    },
+
+    -- 按钮设置
+    button = {
+        rastersize = "100x32",
+        new = "新建(N)",
+        edit = "编辑(E)",
+        browse = "浏览(B)...",
+        del = "删除(D)",
+        up = "上移(U)",
+        down = "下移(O)",
+        clean = "一键清理",
+        ok = "确定",
+        cancel = "取消",
+        help = "帮助(?)"
+    },
+
+    -- 标签文本
+    label = {
+        title = "环境变量编辑器:",
+        search_placeholder = "输入关键词搜索...",
+        tab_sys = "系统变量 (System)",
+        tab_user = "用户变量 (User)"
+    },
+
+    -- 布局设置
+    layout = {
+        vbox_gap = "5",
+        vbox_margin = "0x0",
+        vbox_all_margin = "10x10",
+        vbox_all_gap = "5",
+        hbox_gap = "10",
+        hbox_margin = "10x10",
+        hbox_alignment = "ACENTER"
+    },
+
+    -- 状态栏
+    status = {
+        normal = "状态: 就绪",
+        readonly = "状态: ⚠️ 只读模式 (无管理员权限)",
+        saving = "状态: 保存中...",
+        saved = "状态: ✓ 保存成功",
+        error = "状态: ✗ 保存失败",
+        deleted = "状态: 已删除选中项",
+        loaded = "状态: 已加载系统和用户变量",
+        drag_folder_only = "提示: 只能拖拽文件夹添加到 PATH"
+    }
+}
+
+return config