Add support for JSONata expressions

[zirkelc]

This is a Feature Proposal

Description

AWS recently introduced support for JSONata expressions as an alternative to JSONPath:
https://aws.amazon.com/blogs/compute/simplifying-developer-experience-with-variables-and-jsonata-in-aws-step-functions/
https://docs.aws.amazon.com/step-functions/latest/dg/transforming-data.html

I would invest the time to submit a PR if there's a chance we get this merged quickly. I've been waiting for this feature for a long time!

[zirkelc]

It's actually already supported #636