Convert u64 IDs to newtypes (#1532)

editor/src/messages/dialog/new_document_dialog/new_document_dialog_message_handler.rs

@@ -1,6 +1,7 @@
 use crate::messages::layout::utility_types::widget_prelude::*;
 use crate::messages::prelude::*;
 
+use graph_craft::document::NodeId;
 use graphene_core::uuid::generate_uuid;
 
 use glam::{DVec2, IVec2, UVec2};
@@ -26,7 +27,7 @@ impl MessageHandler<NewDocumentDialogMessage, ()> for NewDocumentDialogMessageHa
 
 				let create_artboard = !self.infinite && self.dimensions.x > 0 && self.dimensions.y > 0;
 				if create_artboard {
-					let id = generate_uuid();
+					let id = NodeId(generate_uuid());
 					responses.add(GraphOperationMessage::NewArtboard {
 						id,
 						artboard: graphene_core::Artboard::new(IVec2::ZERO, self.dimensions.as_ivec2()),