feat: 添加 Windows 环境变量编辑器 GUI 应用程序

- 基于 IUP GUI 库开发 Windows 环境变量编辑器
- 实现 PATH 变量的加载、编辑、保存功能
- 提供新建、编辑、浏览、删除、上下移动路径等操作
- 添加管理员权限检查，确保系统变量修改权限
- 包含完整的项目构建配置（Makefile）和依赖库

libs/iup-3.31_Win64_dllw6_lib/include/iup_varg.h

@@ -0,0 +1,52 @@
+/** \file
+* \brief IUP API with explicit variable argument parameters.
+*
+* See Copyright Notice in "iup.h"
+*/
+
+#ifndef __IUP_VARG_H 
+#define __IUP_VARG_H
+
+#include <stdarg.h>
+#include "iup.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+IUP_API void      IupLogV(const char* type, const char* format, va_list arglist);
+
+IUP_API Ihandle*  IupSetAttV(const char* handle_name, Ihandle* ih, const char* name, va_list arglist);
+
+IUP_API void      IupSetStrfV(Ihandle* ih, const char* name, const char* format, va_list arglist);
+IUP_API void      IupSetStrfIdV(Ihandle* ih, const char* name, int id, const char* format, va_list arglist);
+IUP_API void      IupSetStrfId2V(Ihandle* ih, const char* name, int lin, int col, const char* format, va_list arglist);
+
+IUP_API Ihandle*  IupSetCallbacksV(Ihandle* ih, const char *name, Icallback func, va_list arglist);
+
+IUP_API Ihandle*  IupCreateV(const char *classname, void* first, va_list arglist);
+IUP_API Ihandle*  IupVboxV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupZboxV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupHboxV(Ihandle* child,va_list arglist);
+IUP_API Ihandle*  IupNormalizerV(Ihandle* ih_first, va_list arglist);
+IUP_API Ihandle*  IupCboxV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupGridBoxV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupMultiBoxV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupMenuV(Ihandle* child,va_list arglist);
+IUP_API Ihandle*  IupTabsV(Ihandle* child, va_list arglist);
+IUP_API Ihandle*  IupFlatTabsV(Ihandle* child, va_list arglist);
+
+IUP_API void      IupMessageV(const char *title, const char *format, va_list arglist);
+IUP_API Ihandle*  IupParamBoxV(Ihandle* param, va_list arglist);
+IUP_API int       IupGetParamV(const char* title, Iparamcb action, void* user_data, const char* format, va_list arglist);
+
+/* must include iupglcontrols before this file to enable this declaration */
+#ifdef __IUPGLCONTROLS_H  
+#ifndef IUP_GLCONTROLS_API
+#define IUP_GLCONTROLS_API
+#endif
+IUP_GLCONTROLS_API Ihandle*  IupGLCanvasBoxV(Ihandle* child, va_list arglist);
+#endif
+
+
+#endif