Node network subgraph editing (#1750)

* Breadcrumb visualization, nested network consistency, create definitions for Merge internal nodes

* Add index to network inputs, remove imports usage from flatten network

* Replace NodeOutput with NodeInput::Node

* Fully remove imports field, remove unnecessary identity nodes, move Output node to encapsulating network

* Replace previous_outputs with root_node, fix adding artboard/layer to empty network

* Import/Export UI nodes

* Display input/output types dynamically from compiled network

* Add LayerNodeIdentifer::ROOT_PARENT

* Prevent .to_node() on ROOT_PARENT

* Separate NodeGraphMessage and GraphOperationMessage

* General bug fixes with nested networks

* Change layer color, various bug fixes and improvements

* Fix disconnect and set node input for proto nodes and UI export node

* Dashed line to export for previewed node

* Fix deleting proto nodes and nodes that feed into export

* Allow modifications to nodes outside of nested network

* Get network from Node Id parameter

* Change root_node to previous_root_node

* Get TaggedValue from proto node implementation type when disconnecting

* Improve preview functionality and state

* Artboard position and delete children fix

* Name inputs/outputs based on DocumentNodeDefinition or type, fix new artboard/layer insertion

* replace "Link" with "Wire", adjust previewing

* Various bug fixes and improvements

* Modify Sample and Poisson-Disk points, fix incorrect input index and deleting currently viewed node

* Open demo artwork

* Fix opening already upgraded documents and refactor FrontendGraphDataType usages

* Fix deleting within network and other bugs

* Get default node input from compiled network when copying, fix previews, tests, demo artwork

* Code cleanup

* Hide EditorApi and add a comment describing unresolved Import node input types

* Code review

* Replace placeholder ROOT_PARENT NodeId with std::u64::MAX

* Breadcrumb padding

---------

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

node-graph/gcore/src/memo.rs

@@ -177,7 +177,7 @@ impl<T> LetNode<T> {
 #[derive(Debug, Clone, PartialEq, Eq, Default)]
 pub struct EndLetNode<Input, Parameter> {
 	input: Input,
-	paramenter: PhantomData<Parameter>,
+	parameter: PhantomData<Parameter>,
 }
 impl<'i, T: 'i, Parameter: 'i + From<T>, Input> Node<'i, T> for EndLetNode<Input, Parameter>
 where
@@ -192,7 +192,7 @@ where
 
 impl<Input, Parameter> EndLetNode<Input, Parameter> {
 	pub const fn new(input: Input) -> EndLetNode<Input, Parameter> {
-		EndLetNode { input, paramenter: PhantomData }
+		EndLetNode { input, parameter: PhantomData }
 	}
 }