feat: add methods and tests for logger state management

- Add methods to expose converting log level, checking if a custom logger is set, retrieving the current logger, and resetting the logger state
- Implement a method for simulating method calls
- Add tests for maintaining logger state across multiple operations
- Include a test for handling logger replacement
- Create tests for edge cases including handling empty messages and special characters

Author: muzahidul-opti

lib/src/logger/logger_bridge.dart

@@ -74,4 +74,29 @@ class LoggerBridge {
         return OptimizelyLogLevel.info;
     }
   }
+  
+  /// Expose convertLogLevel 
+  static OptimizelyLogLevel convertLogLevel(int rawValue) {
+    return _convertLogLevel(rawValue);
+  }
+
+  /// Check if a custom logger is set
+  static bool hasLogger() {
+    return _customLogger != null;
+  }
+
+  /// Get the current logger
+  static OptimizelyLogger? getCurrentLogger() {
+    return _customLogger;
+  }
+
+  /// Reset logger state
+  static void reset() {
+    _customLogger = null;
+  }
+
+  /// Simulate method calls
+  static Future<void> handleMethodCallForTesting(MethodCall call) async {
+    await _handleMethodCall(call);
+  }
 }