Enhance CommandLine and LoggerFactory for better type safety and clarity

* Further refined `CommandLine` class to ensure consistent use of `CommandLineOptions`.
* Improved method organization in command line option setup for better readability.
* Updated `LoggerFactory` to utilize `LoggingLevel` directly in logging level management, streamlining the process.

test/config/Browserstack/BrowserstackApi.ts

@@ -1,5 +1,7 @@
 import SupportedBrowser from "./SupportedBrowser";
 
+// Source: https://github.com/browserstack/api
+
 export class BrowserstackApi {
     private readonly _baseUrl: string = 'https://api.browserstack.com/5';
     private readonly _authorizationHeader: string;
@@ -9,11 +11,16 @@ export class BrowserstackApi {
     }
 
     public async getSupportedBrowsers(): Promise<SupportedBrowser[]> {
-        const response = await fetch(`${this._baseUrl}/browsers?flat=true`, {
-            headers: {
-                'Authorization': this._authorizationHeader
-            }
-        });
+        const endpoint = `${this._baseUrl}/browsers?flat=true`;
+        const headers = {
+            'Authorization': this._authorizationHeader
+        };
+
+        const response = await fetch(endpoint, { headers });
+
+        if (!response.ok) {
+            throw new Error(`Failed to fetch BrowserStack supported browsers due to [ ${response.statusText}]`);
+        }
 
         return response.json() as Promise<SupportedBrowser[]>;
     }