[Feature] Add subsidiary studios to parent studio page

[sleetx]

On the Studios page, the card view displays which studios are a parent or subsidiary of other studios. However, when browsing to the individual parent studio, there is no indication it has any subsidiaries.

Contrast this to the page containing the subsidiary studio, which contains a populated "Parent Studio" field.

I think at minimum on the individual studio page, we should add a similar field to indicate subsidiary studios.

For UI purposes in addition to those fields, I'd suggest a redesign in order to show the related studio logos. I envision them in a smaller series of images compared to the displayed studio, but easy enough to digest at a quick glance.

[WithoutPants]

I'm a bit confused by this - we already have a Subsidiary Studios tab in the Studio detail page?

[sleetx]

Ah, some confusion. There is a "Parent Studios" FIELD so I expected to see any subsidiaries up there too. But the subsidiary studios are found in a TAB down below. For consistency's sake, we should probably pick one or the other.

[WithoutPants]

It's inconsistent with the Tag details page, which shows both as fields. Parent Studios don't belong in a tab, because it is a single value. Having the subsidiary studios as a field instead of a tab means that we lose the ability to filter the sub-studios, and it also means that we have to get all of the sub-studios up front. I don't personally feel like its a big issue introducing this regression, but I don't have a large studio network on my system, so I'm not significantly affected by it. I'd like to get more feedback from users before committing to it.

I personally like the way that stash-box shows the sub-studios, so that would be my approach to it, with the logo/studio card shown on hover.