Add scene auto-tagging from filename (#204)

* Add auto tagging for performers, studios and tags

* Fix scene title logging

* Fix golang 1.11 compile error

* Improve regex pattern. Only log when added

* Remove paging from parse query

* Add integration test

* Fix prefix detection on paths

graphql/documents/queries/settings/metadata.graphql

@@ -14,6 +14,10 @@ query MetadataGenerate($input: GenerateMetadataInput!) {
   metadataGenerate(input: $input)
 }
 
+query MetadataAutoTag($input: AutoTagMetadataInput!) {
+  metadataAutoTag(input: $input)
+}
+
 query MetadataClean {
   metadataClean
 }