feat: Implement a simple Event Emitter/PubSub in JavaScript

[heysaiyad]

Create a tool that demonstrates the publish-subscribe pattern. The UI should allow users to subscribe to custom event names and publish events with data, showing the flow in a log.

[nikeshadhikari9]

hello @heysaiyad can you assign it to me, I have previously contributed to other toolkit too.

[pranjalarora98]

@heysaiyad can you plz assign this issue to me!!