Add NewSQLiteSessionManager helper that creates an SCS session manager backed by SQLite, allowing sessions to persist across server restarts. The function handles table creation automatically.
- Add Session wrapper with typed getters (GetString, GetInt, GetBool, etc.) - Add flash message support via Pop methods (PopString, PopInt, etc.) - Add session utilities: Exists, Keys, ID, Clear, Destroy, RenewToken - Create default session manager in New() for zero-config usage - Allow custom session manager via Options.SessionManager - Wrap mux with scs LoadAndSave middleware in Start() - Add session example demonstrating login/logout with flash messages
