add raylib package (#31) (#31)

Vendor raylib C library + pyray Python bindings (CFFI) from commaai's
raylib and raylib-python-cffi forks.

Supports PLATFORM_DESKTOP (X11/GL) and PLATFORM_COMMA (DRM/EGL/GLES)
backends, auto-detected via /TICI.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

pyproject.toml

@@ -12,6 +12,7 @@ members = [
   "ncurses",
   "openssl3",
   "python3-dev",
+  "raylib",
   "zeromq",
   "zstd",
 ]