[Nodejs SDK] should Client expose event handler for events through on/once

To simplify and standardize how events are registered, should we add on/once methods to the handler event?

Current State
- only CommandResponseStream extending EventEmitter

or
expect:
```ts

const client = new Client()

const cb = ()=>console.log

client.on("connecting",cb)

client.on("connected",cb)

client.on("error",cb)

```

### Reference
- https://nodejs.org/en/learn/asynchronous-work/the-nodejs-event-emitter

Locate the Node.js SDK's Client entry point and the existing CommandResponseStream EventEmitter implementation. Compare how current events are exposed with the Node.js EventEmitter reference, then verify that Client supports on/once registration for connecting, connected, and error events.

Written by the indexing model from the issue text.