v0.8.0 — SFML3 & Raylib engine modules

What's New

Engine Support: SFML 3 & Raylib

• Two new installable modules: engine-sfml3 and engine-raylib
• New specialist agents: sfml-specialist and raylib-specialist — each covers library-specific patterns, C++/CMake best practices, and full subsystem documentation
• /setup-engine now supports SFML 3 and Raylib: engine selection, honest tradeoffs, CLAUDE.md templates, naming conventions, specialist routing, and CMake build scaffolding
• Section 4.5 scaffolds CMakeLists.txt + src/main.cpp during engine setup

Framework Improvements

• engine-code.md updated with C++ hot-path examples alongside GDScript ones
• AGENTS.md updated with new engine options, agent counts (51), and skill counts (77)