I102 valkyrie validations

[ShanaLMoore]

Create change set for model resources and a TitleValidator.

Enforce the validator with generic_work_resource_cs = GenericWorkChangeSet.new(GenericWorkResource.new). 

generic_work_resource_cs.valid? => false

generic_work_resource_cs.errors.messages => => {:title=>["can't be blank", "Your work must have a title."]}

Issue:

• 🎁 implement Valkyrie equivalent validations for model resources notch8/hykuup_knapsack#102

Docs:

• https://github.com/samvera/valkyrie/wiki/Persisting-changes-through-synchronization#successfully-change-and-save

TODO

• Confirm via rails console
• Confirm via UI/manual work creation

[ShanaLMoore]

consider making a default changeset

[ShanaLMoore]

As discussed with LaRita, we're holding off on this merge. Is this the right way to do this? Can validations be enforced using the yaml?

[ShanaLMoore]

When I made title not be a required field on the form, I can still successfully save a generic work resource from the ui, even with the validator. Perhaps it doesn't go through the changeset??

Update: it inherits from Hyrax::ChangeSet 🤔 which doesn't have a title validation. How do I make the resource forms use their respective changesets?