⚙️ Update IIIF Print config

This config change will allow the child works to be created.  Prior,
they were not passing validating because they child works
(GenericWorkResource) was missing a keyword which is a requirement.

Ref:
  - #102

config/initializers/iiif_print.rb

@@ -1,2 +1,63 @@
 # frozen_string_literal: true
-# TODO: fill out with any pals-specific code or delete
+
+IiifPrint.config do |config|
+  # NOTE: WorkTypes and models are used synonymously here.
+  # Add models to be excluded from search so the user
+  # would not see them in the search results.
+  # by default, use the human-readable versions like:
+  # @example
+  #   config.excluded_model_name_solr_field_values = ['Generic Work', 'Image']
+
+  # Add configurable Solr field key for searching,
+  # default key is: 'human_readable_type_sim'
+  # if another key is used, make sure to adjust the
+  # config.excluded_model_name_solr_field_values to match
+  # @example
+  #   config.excluded_model_name_solr_field_key = 'some_solr_field_key'
+
+  # Configure how the manifest sorts the canvases, by default it sorts by :title,
+  # but a different model property may be desired such as :date_published
+  # @example
+  #   config.sort_iiif_manifest_canvases_by = :date_published
+
+  # config.default_iiif_manifest_version = 3
+
+  # OVERRIDE IIIF Print v3.0.1 to add keyword since it is required
+  config.child_work_attributes_function = lambda do |parent_work:, admin_set_id:|
+    embargo = parent_work.embargo
+    lease = parent_work.lease
+    embargo_params = {}
+    lease_params = {}
+    visibility_params = {}
+
+    if embargo
+      embargo_params = {
+        visibility: 'embargo',
+        visibility_after_embargo: embargo.visibility_after_embargo,
+        visibility_during_embargo: embargo.visibility_during_embargo,
+        embargo_release_date: embargo.embargo_release_date
+      }
+    elsif lease
+      lease_params = {
+        visibility: 'lease',
+        visibility_after_lease: lease.visibility_after_lease,
+        visibility_during_lease: lease.visibility_during_lease,
+        lease_release_date: lease.lease_expiration_date
+      }
+    else
+      visibility_params = { visibility: parent_work.visibility.to_s }
+    end
+
+    # The child work is a GenericWorkResource which requires a keyword so we're falling back to the title
+    # since not all parent works require a keyword.
+    params = {
+      admin_set_id: admin_set_id.to_s,
+      creator: parent_work.creator.to_a,
+      keyword: parent_work.keyword.presence || parent_work.title,
+      rights_statement: parent_work.rights_statement.to_a,
+      is_child: true
+    }
+
+    params.merge!(embargo_params).merge!(lease_params).merge!(visibility_params)
+  end
+end