Code cleanup and refactoring to enhance consistency (#1695)

- Move message handler payload data into structs
- Organize the file structure used by `editor/src/messages/portfolio/document` `/node_graph` and `/graph_operation`
- Make derive attributes use `serde::Serialize, serde::Deserialize` consistently instead of `use serde::{Deserialize, Serialize};` imports
- Various other code cleanup and refactoring

libraries/dyn-any/src/lib.rs

@@ -168,7 +168,9 @@ macro_rules! impl_slice {
 
 mod slice {
 	use super::*;
+
 	use core::slice::*;
+
 	impl_slice!(Iter, IterMut, Chunks, ChunksMut, RChunks, RChunksMut, Windows);
 }