Add CraftEngine item rendering support

[Mrcuttlefish]

Adds optional CraftEngine support to InteractiveChatDiscordSrvAddon item rendering.

This fixes CraftEngine custom items/blocks not rendering correctly. ICD will still need the resourcepack to render the items properly.

[LOOHP]

Thanks for the PR! However, could it be done by registering the transformer on IC side here? You can take a look at the EcoEnchants hook.

[Mrcuttlefish]

I think it can, I focused here because it was not showing in the previews but I think I can modify the other hook to pass through the items and show the correct preview.

[LOOHP]

Using the API is probably better, as you get the additional benefit of having the transformed item in the chat events too (for lore and stuff).

[Mrcuttlefish]

I spent the last bit trying to get it to work via registering a transformer but I was not able to. I believe this is due to how Craftengine choses to render custom items however I was able to consistently get it to work here. I only added a hook to grab the CE texture pack.