[Feature] add disk cache size limit

[narapeka]

What problem does this solve?

It seems currently there is no limit of cached pictures on disk.
I tested a small library with < 1000 items, which leads to >1GB disk cache.
Compared to emby client, it only consumed < 300MB disk size.

Proposed solution

Maybe have two directions to consider:

1. Either load pictures always from server, by improving threading and lazy loading mechanism
2. or add limit and LRU logic for disk cache

Platform

Android TV

Alternatives considered

No response

Additional context

No response