* Added validation for required command line options in the `CommandLine` class to ensure necessary parameters are provided.
* Updated `TestConfiguration` to store and expose the logging level from command line options.
* Refactored `BrowserstackApi` to improve method naming and added content type headers for API requests.
* Changed `SupportedBrowser` type to be exported for better accessibility.
* Updated `Page` and `SubscribingPage` classes to use a consistent browser import and improved constructor parameters.
* Introduced `CommandLine` class for handling command line options and arguments
* Added `TestConfiguration` class to manage application credentials and URIs
* Implemented example usage for generating command line arguments from a configuration object
* Updated `package.json` to include `commander` dependency
* Removed unused `TestRunner` class and created a new `TestRunner` for executing tests with command line options
* Adjusted logging level type to use lowercase values for consistency
