Add Browserstack API integration and supported browser type

* 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.

test/runner/TestRunner.ts

@@ -12,9 +12,11 @@ class TestRunner {
   private static readonly _commandLineOptions: CommandLineOptions = CommandLine.parse(process.argv);
 
   public static main(): void {
-    // const testRunner = new TestRunner();
-    // testRunner.run();
+    const testRunner = new TestRunner();
+    testRunner.run();
+  }
 
+  public run(): void {
     console.log(TestRunner._commandLineOptions);
   }
 }