[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.