bump: minor type: feat Prebuilt binary packages (#64) — a package can now ship a compiled artifact whose exported functions, systems and components a consumer uses without the source, over the stable reflection C-ABI. `x build-lib ` compiles a package's module to a per-target native dylib (`lib//`); a `kind prebuilt` dependency is fetched and linked like any other, and `x link-flags` prints the clang flags to link the module dylibs into a game (or `x app` does it in-repo). A module registers its dynamic components (`world_register_prop`) and its `@System(Phase)` functions with the host at load through a constructor, and the host dispatches every registered system each frame — the systems analogue of dynamic components. Binary packages are native-only and second-class ECS by design (source packages remain the portable, first-class, deterministic path); missing a build target is a hard error. See docs/PACKAGES.md.