Support `*.jar.disabled` mods

### Enhancement Type

A completely new feature

### Describe the enhancement

Some launchers allow you to disable installed mods as a way to prevent it from being used and not having to fully remove it. I usually use this if I'm testing things and likely want to return to using the mod after tests. If I was to do this with the image now, it would just redownload the mod that was renamed `.jar.disabled`.

I was wondering the possibility of supporting this file naming as an alternative to the mod's expected filename? That way the system recognizes that the mood is there and doesn't redownload it.

The issue does not name specific files or tests. Start by locating the startup logic that checks installed mod filenames against expected downloads, then trace how a `.jar.disabled` file is handled. Done means an installed disabled mod is recognized and is not redownloaded.

Written by the indexing model from the issue text.