[Feature Request] - Support non-square cover art

[Hydronicx]

Summary

Currently, non-square cover art is cropped to the lowest dimension. This is not desirable. Non-square art should be supported and displayed in full.

Use Case

Some albums have non-square cover art (think DVDs, box sets, etc.). Moreover, even regular cover art that should be square in theory might be slightly less square. Current behavior results in some cropping even in this case, which is not desirable.

Additional context

Non-square cover art is supported for example in the Navidrome web UI.