[Feature] Add option for images to inherit performers,tags,studio from gallery they are in

[imagineimaginingthings]

Is your feature request related to a problem? Please describe. I'm a collector of erotica (think sites like MetArt) for well over a decade and as such I have tens of thousands of galleries in my Stash containing millions of images. While it's been easy enough to set all the galleries with the correct studio and performer(s) (although a chore), none of the images in the galleries have any data like that, and it is unfeasible for someone to manually tag literally millions of images with their performers etc.

Describe the solution you'd like When viewing a gallery, it would be ideal if we had the option to apply the gallery's performers, tags and studio data to all images in that gallery.

Additionally, this could also be added as a tool in the settings page for bulk editing, where it could be told to parse through ALL galleries and set performer, studio and tag data to their respective images.

Describe alternatives you've considered AutoTag - is at best unreliable for this use case as filenames are typically acronyms, abbreviations and/or numbers relating to the photographer and set name, i.e. they don't usually contain data relevant to autotagging such as the model's name for instance. Furthermore, in the case of performer data, models often use different names on different websites so it would potentially result in a lot of false positives.

Additional context I'm too lazy to mockup a screenshot of how this might look at the moment, but I am envisioning a menu similar to the "Scrape with..." button on scenes, but instead it would contain these options, albeit in a more concise form:

1. Apply gallery tags to all images in this gallery
2. Apply gallery performers to all images in this gallery
3. Apply gallery studio to all images in this gallery
4. Apply all the above to all images in this gallery

Of course if a user has only a few images selected then it would apply only to them rather than the entire set, though this isn't necessary for my use case it may be for others.

Let me know if anything wasn't clear, or if I've perhaps missed a way we can do this already. Thanks.

[WithoutPants]

This seems a perfect candidate for a plugin.