Add a cursor example

[mtuchi]

Description

See slide 49

[josephjclark]

Maybe! I would prefer to add a helper function to common which takes most of the pain away: OpenFn/adaptors#486

Saying that, I think half the pain is in setting up the input properly. We should use input states for this, rather than hard-coding values into job code.

We should discuss this week @mtuchi - this is a high priority one for me!