Resolve #3464539 "Allow taxonomy widget"

Closes #3464539

config/schema/schemadotorg.settings.schema.yml

@@ -153,6 +153,18 @@ schemadotorg.settings:
               ignore_additional_mappings:
                 type: boolean
                 label: 'Ignore additional Schema.org mappings'
+              widget_id:
+                type: string
+                label: 'Widget ID'
+              widget_settings:
+                type: ignore
+                label: 'Widget settings'
+              formatter_id:
+                type: string
+                label: 'Formatter ID'
+              formatter_settings:
+                type: ignore
+                label: 'Formatter settings'
         default_field_formatter_settings:
           type: sequence
           label: 'Default field formatter settings'