SAML Test Identity Provider

The `saml-idp` package provides a straightforward and highly configurable SAML 2.0 Identity Provider (IdP) designed exclusively for local development and testing purposes. Its primary function is to help developers test Service Providers (SPs) against the SAML 2.0 Web Browser SSO Profile and the Single Logout Profile without needing access to a production-grade IdP. The current stable version is 1.2.1. It features a simple API (`runServer`) for programmatic use and a command-line interface for quick setup. A key differentiator is its explicit focus on being a non-production test utility, allowing full control over SAML assertions and user claims for debugging SP integrations. It is not intended for production systems due to its design simplicity and lack of robust security features expected in a production IdP.