Mod dependency type: Assets only

[Hexicube]

For situations where you want to have another mod loaded purely to use its assets, but do not require the mod to be enabled.

This would be useful for using Space Age assets without requiring the feature flag (though the mod portal should detect the requirement), or using assets from other mods in general, without having to copy those assets.

Ideally, this should also work with an incompatible/optional dependency for the same mod, possibly through using both characters in the same line.

Given the FFF released today mentioning a new dependency type, this feels like the perfect time to add this one.

[Shemp]

How would a "soft-loaded" mod interact with the mods table?