Add multiple thumbnail view modes

[Lasidar]

This request respects the following points:

• This request is not already on GitHub (I've searched it).
• I agree to follow Jellyfin's Code of Conduct.

Describe the feature you would like

Add the ability to display movie thumbnails in a variety for formats (I.e. Banner, List, Poster, Poster Card, Thumb, Thumb Card).

Why is this feature needed?

This maintains parity with the Jellyfin mobile client. Current roku only displays thumbnails using the Poster format.

Additional Context

No response

[Lasidar]

As discussed on Discord, I will be working on this ticket.