Start to add collection search index

config/sync/search_api.index.collection.yml

@@ -0,0 +1,34 @@
+uuid: 4706378a-3a02-48d7-8672-d8313e9c20f3
+langcode: en
+status: true
+dependencies:
+  config:
+    - search_api.server.database
+  module:
+    - search_api
+    - node
+id: collection
+name: Collection
+description: 'An index for the collection content type.'
+read_only: false
+field_settings: {  }
+datasource_settings:
+  'entity:node':
+    bundles:
+      default: false
+      selected:
+        - collection
+    languages:
+      default: true
+      selected: {  }
+processor_settings:
+  add_url: {  }
+  aggregated_field: {  }
+  rendered_item: {  }
+tracker_settings:
+  default:
+    indexing_order: fifo
+options:
+  index_directly: true
+  cron_limit: 50
+server: database