[CIT] A way to change speciffically named Spyglasses and Tridents

[Ghiojo]

Description of the new feature

Currently I'm not sure if this exists because I can't find it in any documentation, but there seems to be no way to be able to implement a CIT for the models of Tridents and Spyglasses when held. Yes, I know you can change them as a global thing in the Custom Entity Model section, but you can't make it so you apply a custom model to a trident or spyglass named a speciffic way, that is to say, only when my spyglass is named "Silver Spyglass" for example, it renders a texture of a silver spyglass rather than all rendered spyglasses regardless of name being silver in color.

I think it's a bit of a missed opportunity if this doesn't exist, because that would let resource pack creators mess with all those things when doing stuff with Custom items based on names.

[Regnander]

Regarding tridents and other projectiles: #2703