[feature] pinch-to-zoom

[joeriddles]

Is your feature request related to a problem? Please describe.
The June LiveKit newsletter update announced pinch-to-zoom:

Describe the solution you'd like
pinch-to-zoom support added to VideoTrackRenderer

Describe alternatives you've considered

Additional context

[BawazierMurphy]

Is your feature request related to a problem? Please describe. The June LiveKit newsletter update announced pinch-to-zoom:

Describe the solution you'd like pinch-to-zoom support added to VideoTrackRenderer

Describe alternatives you've considered

Additional context

Hi @joeriddles,
Thank you for reaching out regarding the pinch-to-zoom feature in the LiveKit SDK for Flutter. Below is a simple implementation example that you can use to add this feature to your project:

import 'package:flutter_webrtc/flutter_webrtc.dart';
import 'package:livekit_client/livekit_client.dart';

Room room = Room();

Future<void> setZoomLevel(double level) async {
  var mediaStream = room.localParticipant
      ?.videoTrackPublications.firstOrNull?.track?.mediaStreamTrack;
  if (mediaStream != null) {
    await Helper.setZoom(mediaStream, level);
  }
}

This code sets up a method to adjust the zoom level of the video track using the flutter_webrtc package. The setZoomLevel function accepts a double value for the zoom level and applies it to the media stream track of the local participant's video.

[heshheshsiin]

We really need this feature in the Flutter SDK version.
Basically "Camera Control", ability to zoom in (pinch to zoom) from the streamer.