Added a new `DependencyInjectionTests` class to validate the
dependency injection setup for the `ReCClient` class.
- Added tests to ensure `ReCClient` can be resolved when registered
with a base URL or custom HTTP client configuration.
- Verified default options are registered when no callback is
supplied and that options callbacks are applied correctly.
- Added tests to validate behavior when `LogSuccessfulRequests`
is enabled, including scenarios with and without a registered
logger.
- Included necessary `using` directives for DI, logging, options,
HTTP client, and the `ReC.Client` namespace.
