[Request] Merge tags on batch scrape url

[Skier23]

I like the idea of batch scraping urls for metadata, however, in my opinion, there needs to be a merge option (at least for tags) rather than strictly a replace. I've found for some studios, the source tags are really good and others stashdb has tags that the original didn't that are better. So merge really is the only way to preserve that type of info.