Enable Drutopia Collection feature module for issue indexes

Ref #31
Ref #32

config/sync/field.field.node.collection.field_authors.yml

@@ -0,0 +1,31 @@
+uuid: 762ee90e-0623-4e6f-a588-cf9d2842d707
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_authors
+    - node.type.collection
+    - node.type.people
+_core:
+  default_config_hash: OrTTW4_ECRhwCEGANjteWeZi18YWtx-oqSJtjtsnQfM
+id: node.collection.field_authors
+field_name: field_authors
+entity_type: node
+bundle: collection
+label: Authors
+description: 'Optionally attribute this collection to one or more of the <em>People</em> with profiles on the site.'
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings:
+  handler: 'default:node'
+  handler_settings:
+    target_bundles:
+      people: people
+    sort:
+      field: title
+      direction: ASC
+    auto_create: false
+    auto_create_bundle: ''
+field_type: entity_reference