Generate internal defnc components with ^:private metac

[SevereOverfl0w]

When completing you get both -render-type and -item-render-type for the component. I think these should be private instead, thoughts?

[lilactown]

That makes sense to me. This is only when using factory functions, and you should be able to use helix.core/type to get the render fn from the factory fn if needed.

[SevereOverfl0w]

That's so useful, I've been breaking the rules then!

[lilactown]

Undocumented code might as well not exist 😝