Exposes the saml_routes/2 macro for mounting SAML endpoints in a Phoenix router.

After mix relyra.install, add the macro inside your host router scope (when unambiguous, the installer injects this for you):

import Relyra.Phoenix.Router

scope "/saml", MyAppWeb do
  saml_routes()
end

This mounts metadata GET, login GET/POST, and ACS POST for each connection_id. The ACS route skips CSRF verification via Relyra.Phoenix.Pipeline — see Getting Started for the full Day-1 wiring narrative.