Refactor logger option

[cleptric]

This changes the logger option to accept a LoggerInterface instance.
This simplifies debugging the SDK, as you can now pass in one of the provided loggers, either DebugFileLogger or DebugStdOutLogger.

Sentry\init([
    ...
    'logger' => new DebugFileLogger(filePath: ROOT . DS . 'sentry.log'),
    ...
]);

sentry/sentry: [debug] The "Sentry\Integration\RequestIntegration" integration has been installed.
sentry/sentry: [debug] The "Sentry\Integration\TransactionIntegration" integration has been installed.
sentry/sentry: [debug] The "Sentry\Integration\FrameContextifierIntegration" integration has been installed.
sentry/sentry: [debug] The "Sentry\Integration\EnvironmentIntegration" integration has been installed.
sentry/sentry: [debug] The "Sentry\Integration\ModulesIntegration" integration has been installed.
sentry/sentry: [error] Failed to send the event to Sentry. Reason: "The DSN option must be set to use the HttpClient.".

As a follow-up, we should add more logging statements across the SDK to ease debugging and provide more context on what is happening internally.