feat: Replace libtcod with libtcod-headless fork (closes #134)
Replace upstream libtcod with jmccardle/libtcod-headless fork that:
- Builds without SDL dependency (NO_SDL compile flag)
- Uses vendored dependencies (lodepng, utf8proc, stb)
- Provides all core algorithms (FOV, pathfinding, BSP, noise)
Changes:
- Update .gitmodules to use libtcod-headless (2.2.1-headless branch)
- Add NO_SDL compile definition to CMakeLists.txt
- Remove old libtcod submodule
Build instructions: deps/libtcod symlink should point to
modules/libtcod-headless/src/libtcod (configured during build setup)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
John McCardle
8854d5b366