RSDK-3015 - Fix streamStatus

[cheukt]

status stream used to not work at all, reworked so it works? maybe.

pretty open to suggestions as to where I should be putting the new class, and its name, but all it is is a concrete impl of ResponseStream leveraging the existing EventDispatcher class.

tested using the below block

  let stream = robot.streamStatus([], new Duration().setNanos(500_000_000));
  stream.on('data', (response: VIAM.robotApi.Status[]) => {
    console.log(response);
  });
  stream.on('status', (newStatus?: { details: unknown }) => {
    console.error('error streaming robot status', newStatus);
  });
  stream.on('end', () => {
    console.error('done streaming robot status');
  });

[maximpertsov]

This seems okay - just some minor changes.

In addition, let's codify your testing example as a unit test:

let stream = robot.streamStatus([], new Duration().setNanos(500_000_000));
  stream.on('data', (response: VIAM.robotApi.Status[]) => {
    console.log(response);
  });
  stream.on('status', (newStatus?: { details: unknown }) => {
    console.error('error streaming robot status', newStatus);
  });
  stream.on('end', () => {
    console.error('done streaming robot status');
  });

[maximpertsov]

Suggested change

	import type { ResponseStream } from './gen/robot/v1/robot_pb_service';
	export class IResponseStream<T> extends EventDispatcher {
	private stream: ResponseStream<any>;
	constructor(stream: ResponseStream<any>) {
	super();
	this.stream = stream;
	}
	override on(
	type: string,
	handler: (message: any) => void
	): IResponseStream<T> {
	super.on(type, handler);
	return this;
	}
	import type { ResponseStream as ProtoResponseStream } from './gen/robot/v1/robot_pb_service';
	export class ResponseStream<T> extends EventDispatcher {
	private stream: ProtoResponseStream<any>;
	constructor(stream: ProtoResponseStream<any>) {
	super();
	this.stream = stream;
	}
	override on(
	type: string,
	handler: (message: any) => void
	): ResponseStream<T> {
	super.on(type, handler);
	return this;
	}

[maximpertsov]

since this isn't an interface, let's just call it ResponseStream and alias the raw proto version. if you agree let's follow this pattern for the rest of this PR.

Also, we should export this type in main to make it available to users.

[cheukt]

renamed the class to ViamResponseStream (but did not export) and added alias for RobotStatusStream

[cheukt]

@maximpertsov this was tested using the sample code from app and adding the bit I wrote above

[maximpertsov]

we should export this in src/main.ts as well so users have access to this type