Support for Kit Previews

[Whoneedspacee]

Pre-game in SSM shows abilities like spider leap and wall climb as well as needler, add a material var for attributes and if that is defined it will show it as a preview when the kit is in preview mode. Attributes should probably have descriptions as well to support this.

There should be a seperate equipKitPreview after equipKit that disables the kit attributes somehow and equips different items. AddAttributes should probably be its own method called in equipKit so we can avoid adding attributes multiple times (or we can just be lazy and delete them through the removekit type methods)

This might require some refactoring to make it look nice without these methods, or we could just add disableKit and enableKit methods that remove the owner from all attributes and abilities owned by the kit, though I'm doubtful that will be enough to disable some of them.