[Proposal] Implementation of "Studio" Filter in Movie Library

[bluesam1]

I am a jellyfin user, and I wanted to dip my toes into helping out with the development. I noticed there is no 'Filter by Studio' feature for the Movie Library. I noticed the backend already returns Studio metadata, but the frontend lacks the dropdown filter (unlike TV Shows).

My Plan:

• Duplicate the filter logic from controllers/shows/tvshows.js (or relevant controller).
• Add the 'Studio' dropdown to the Movie view.

I am ready to start working on this. Does this approach align with the current architecture?