Feature/add cancellation tokens

[rk132]

SDK-971

Description

• Update methods to throw an error, when cancellationToken was called, and handle them in the Elements scene

[HarrisonHough]

It's super annoying that we have to add this in all the exception parts of this script.
It could be moved into some sort of "HandleException(ex)" function to reduce the code duplication.
Eg

        private void HandleException(Exception e)
        {

            ThrowErrIfCancellationException(e);
            OnError?.Invoke(e.Message);
        }

It might also be nice in future to change the OnError action to have a parameter of type Exception. Then we can just use that for everthing (including throwing the cancellation exception). It would be a breaking change though.

[rk132]

Yep, can move onError there as well.

[MaxAndreassenRPM]

You can actually use the built in exclude logic to handle this, if you wanted a more graceful solution ->

catch (Exception ex) when (ex is not OperationCanceledException)

https://stackoverflow.com/questions/12633903/elegantly-handle-task-cancellation

[HarrisonHough]

cancellation token stuff is okay but I don't think we should be throwing errors like this.
people are going to freak out when they see all these errors even though it's not a breaking error

maybe warnings or something but even then it's gonna spam the logs, happy to discuss though

[HarrisonHough]

Great work on this btw