VieCut v1.1

What's New

• GCC 15 compatibility: Added missing #include <cstdint> and #include <optional> headers, suppressed -Wtemplate-body errors
• Updated tlx submodule to v0.6.1
• Improved README: Badges, logo, structured documentation, DBLP-verified citations
• Homebrew formula: brew install KaHIP/kahip/viecut (Linux)