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.

Start by reviewing the existing CMake build/install flow and the upstream microsoft/vcpkg port conventions. Define the port metadata and versioning for released iceberg-cpp versions, then verify that vcpkg can build and install the package through the existing CMake flow.

Written by the indexing model from the issue text.