Use event subscribers for importing/updating JD data

All event types: https://developer.deere.com/dev-docs/webhook#events

Can we replicate the DSS field operation event via our table/bulk importers?

Odd.. the events do not all have the same properties. For example, field operations do not have an "action" for created/updated/deleted, like fields, boundaries, and most other events do have.

I've created an initial event class with create/update/delete actions. I also included an "import" event to support things like Machines that do not have standardized events.

Automatically closed - issue fixed for 2 weeks with no activity.