Thumbnails for the layer node (#1210)

* Thumbnails for the layer node

* Raster node graph frames

* Downscale to a random resolution

* Cleanup and bug fixes

* Generate paths before duplicating outputs

* Fix stable id test

* Code review changes

* Code review pass with minor changes

---------

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

frontend/src/wasm-communication/messages.ts

@@ -105,6 +105,8 @@ export class FrontendNode {
 	readonly previewed!: boolean;
 
 	readonly disabled!: boolean;
+
+	readonly thumbnailSvg!: string | undefined;
 }
 
 export class FrontendNodeLink {
@@ -771,6 +773,8 @@ export type LayerTypeData = {
 export class ImaginateImageData {
 	readonly path!: BigUint64Array;
 
+	readonly nodeId!: bigint;
+
 	readonly mime!: string;
 
 	readonly imageData!: Uint8Array;