KnitPkg wired CompositePackages DependencyManagement

If you’ve played with KnitPkg composite packages, you’ve probably hit this classic problem: During development, you want MetaEditor to resolve all your  #include s so that IntelliSense and unit tests work. But when your package is installed as a dependency, those  #include s must point to the real installed headers under  knitpkg/include/ , not to some dev‑only helper….