Replace node definition string-based lookups with DefinitionIdentifier instances (#3451)

* create definition identifier and integrate it

* Bug fixes and code review

* formatting

* Fix migrations

* Fix remove handles migration

* formatting

* Fix test

* Fix tests 2

* fix deserialization

* Code review

* Small fixes

* Consolidate 'Morph' node migrations

* Add old SamplePointsNode name to migrations list

* Fix tests

* Unrelated small fix

* Fix migration crashes

* Fix tests

* Final code review

* fmt

* Add metadata

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/frontend/frontend_message.rs

@@ -2,6 +2,7 @@ use super::utility_types::{DocumentDetails, MouseCursorIcon, OpenDocument};
 use crate::messages::app_window::app_window_message_handler::AppWindowPlatform;
 use crate::messages::input_mapper::utility_types::misc::ActionShortcut;
 use crate::messages::layout::utility_types::widget_prelude::*;
+use crate::messages::portfolio::document::node_graph::document_node_definitions::DefinitionIdentifier;
 use crate::messages::portfolio::document::node_graph::utility_types::{
 	BoxSelection, ContextMenuInformation, FrontendClickTargets, FrontendGraphInput, FrontendGraphOutput, FrontendNode, FrontendNodeType, NodeGraphErrorDiagnostic, Transform,
 };
@@ -60,7 +61,7 @@ pub enum FrontendMessage {
 	// Send prefix: Send global, static data to the frontend that is never updated
 	SendUIMetadata {
 		#[serde(rename = "nodeDescriptions")]
-		node_descriptions: Vec<(String, String)>,
+		node_descriptions: Vec<(DefinitionIdentifier, String)>,
 		#[serde(rename = "nodeTypes")]
 		node_types: Vec<FrontendNodeType>,
 	},