[FEATURE] Capture from multiple cameras

[rabits]

Is your feature request related to a problem? Please describe.

The application needs to support multiple cameras connection.

Describe the solution you'd like

After replatforming that should be easy to add multiple cameras support. USB3 bandwidth and the realsense library already supports that.

Additional context

Multiple cameras can be used to improve the quality of the pointcloud snapshot or to capture the objects from multiple sides momentarily - so it's a great improvement.