Support PromiseRejectionEvent

[PierBJX]

Is your feature request related to a problem? Please describe.
On the global scope, PromiseRejectionEvent is available (see MDN).

But when I run this code:

import { Window } from "happy-dom";
const window = new Window();
console.log(window.PromiseRejectionEvent); // => undefined

This poses an issue for tests running in Jest with @happy-dom/jest-environment.

Describe the solution you'd like
Implement this globally.

Describe alternatives you've considered
N/A

Additional context
N/A

[Satya900]

I have started working on this issue

[Satya900]

I will be implementing the missing PromiseRejectionEvent class in Happy DOM by creating the event interface, extending base Event class, registering in BrowserWindow, and integrating with existing promise rejection infrastructure to match web standards and fix the Jest environment compatibility.

[Satya900]

Please review the PR