CAS Plugin for Better Auth

The `better-auth-cas` package, currently at version `0.1.8`, is an early-stage plugin designed to integrate Central Authentication Service (CAS) functionality into the `better-auth` authentication framework. It provides standard CAS sign-in and callback endpoints, handles CAS ticket validation via `serviceValidate`, and includes robust profile mapping capabilities to translate CAS user attributes into `better-auth` user and session data. A key feature is the optional `onProfileResolved` hook, enabling custom persistence logic. It emphasizes solutions for common CAS integration challenges, such as managing CAS's separate SSO session cookies to prevent "auto-login" after a local logout and addressing `service` URL allowlist mismatches in CAS deployments. While in a pre-1.0 state, implying potential API changes, its initial release (v0.1.0 on 2026-03-19) indicates active development and a focused approach to providing a ready-to-use CAS solution for `better-auth` applications, shipping with TypeScript types for better developer experience.