- Added `CustomAuthCodeRepository` to cache and store nonces during authorization.
- Introduced `CustomTokenResponseType` to resolve cached nonces during token exchange.
- Created `oidc-server.php` configuration for OpenID Connect support, including scopes, claims, and token lifetimes.
- Registered custom implementations in `AppServiceProvider` with bindings for `AuthCodeRepository` and `TokenResponseType`.
- Added feature tests to validate nonce caching and resolution logic.
