Migrate jobs and logic from Earthworks

[thatbudakguy]

The definition for the CheckLayerJob (and maybe other useful things) is currently in Earthworks: https://github.com/sul-dlss/earthworks/blob/main/app/jobs/check_layer_job.rb

It seems like this could be offered as part of the engine instead.

[thatbudakguy]

Also true of rake tasks:
https://github.com/sul-dlss/earthworks/blob/main/lib/tasks/earthworks.rake