New playbook format which separates database target from SQL

[alexanderdean]

This would be a better abstraction as really the SQL scripts are an intrinsic part of the job-to-be-done (the WHAT) but the target properties/credentials (the WHERE) are orthogonal to this.

[colmsnowplow]

I like this. A good example of it done well in great_expectations

[alexanderdean]

Right - that's perfect...

Once we break these out, it becomes safe to come up with a .jar style format which creates a zipped bundle containing all the files (but not the database creds!).