Refactor logging level handling and remove example usage

* Updated `CommandLineOptions` and `ConfigurationObject` to use `LoggingLevel` type instead of string for log levels.
* Modified `LoggerFactory` to set logging levels using the new `LoggingLevelMapping` methods.
* Removed the `example-usage.ts` file as it was no longer needed.
* Adjusted `Threshold` class to simplify logging level management.

test/config/CommandLine.ts

@@ -5,7 +5,7 @@ import {LoggingLevel, LoggingLevelMapping} from '../logger/LoggingLevel';
 export interface CommandLineOptions {
   applicationId: string;
   secret: string;
-  logLevel: string;
+  logLevel: LoggingLevel;
   pcastUri: string;
   ingestUri: string;
   channelUri: string;
@@ -27,7 +27,7 @@ interface ConfigurationObject {
   useBrowserstackLocal: boolean;
   browserstackUser: string;
   browserstackKey: string;
-  logLevel: string;
+  logLevel: LoggingLevel;
   applicationId: string;
   secret: string;
   pcastUri: string;
@@ -101,7 +101,7 @@ export default class CommandLine {
     
     // Logging options
     if (config.logLevel) {
-      args.push('--log-level', config.logLevel);
+      args.push('--log-level', LoggingLevelMapping.convertLoggingLevelToLoggingLevelType(config.logLevel));
     }
     
     return args;