Add a vcpkg port for iceberg-cpp

It would be useful to have an iceberg-cpp port in the upstream microsoft/vcpkg repository, so that projects using vcpkg can easily consume iceberg-cpp.

The port can use the existing CMake build/install flow and package released versions of iceberg-cpp.

首先检查现有的 CMake 构建/安装流程以及 upstream microsoft/vcpkg 的 port 约定。为已发布的 iceberg-cpp 版本定义 port 元数据和版本控制，然后验证 vcpkg 能否通过现有的 CMake 流程构建并安装该软件包。

由索引模型根据 Issue 内容生成。