Add MemoizeImpure node and cache image base64 in graph (#1595)

* Cache base64 representation of images when converting to graphic group

* Fix build

* Fix build again

* Actually fix it this time

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

node-graph/gstd/src/wasm_application_io.rs

@@ -277,6 +277,7 @@ fn decode_image_node<'a: 'input>(data: Arc<[u8]>) -> ImageFrame<Color> {
 			data: image.chunks(4).map(|pixel| Color::from_unassociated_alpha(pixel[0], pixel[1], pixel[2], pixel[3])).collect(),
 			width: image.width(),
 			height: image.height(),
+			..Default::default()
 		},
 		..Default::default()
 	};