* Created `BrowserstackApi` class for interacting with the Browserstack API, including a method to fetch supported browsers.
* Introduced `SupportedBrowser` type to define the structure of browser data returned from the API.
* Updated `TestRunner` to instantiate and run the test execution process, enabling command line options logging.
* 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
