[Feature] Add show_photos toggle to filter media type

[treben]

I have searched the existing feature requests to make sure this is not a duplicate request.

• Yes

The feature

I've been using Immich Kiosk for a short time now and one thing that I think would enhance the experience is adding a show_photos toggle as a symmetrical companion to the show_videos toggle so that you can filter media and only display videos if you'd like.

My specific use case for this is I'm building a small custom card for my Home Assistant dashboard that is powered by Immich Kiosk. The first card that I setup looks and works great displaying photos, but I would like a second card to only display videos from my video library. The way I envision doing this is by setting the show_videos parameter to true and setting a show_photos parameter to false. The show_photos parameter would default to true of course. I could see this being useful for others who would like to only view videos through Immich Kiosk for whatever reason. Thanks!