Boost::filesystem leaked in vix::core public API

[GaspardKirira]

Description

vix::core exported Boost::filesystem as a public dependency even though the framework no longer relies on it internally.

This caused downstream build failures when Boost filesystem targets were not available or not correctly resolved.

Root cause

• Legacy Boost.Filesystem linkage remained in modules/core/CMakeLists.txt.
• Public link interface exposed unnecessary Boost targets.

Impact

• find_package(Vix) failed in consumer projects.
• Increased friction for macOS and minimal Boost installs.

Fix

• Removed Boost::filesystem from vix::core public link interface.
• Restricted Boost dependency to Boost::system only (required by Asio/Beast).

Status

✅ Fixed in v1.17.4