Improvements and Updates in the Code. Converted to ES6 class

[xmaop]

1. nami.js:

   • Converted to ES6 class.
   • Updated methods to use class method syntax.

2. message.js:

   • Converted to ES6 class.
   • Updated methods to use class method syntax.

3. action.js:

   • Converted to ES6 class.
   • Implemented super() for calls to the parent class constructor.
   • Dynamic generation of action classes using createActionClass.
   • Exported dynamically generated classes.

4. response.js:

   • Converted to ES6 class.
   • Implemented super() for calls to the parent class constructor.
   • Updated to export the Response class.

5. event.js:

   • Converted to ES6 class.
   • Implemented super() for calls to the parent class constructor.
   • Updated to export the Event class.