Massively reorganize and clean up the whole Rust codebase (#478)

* Massively reorganize and clean up the whole Rust codebase

* Additional changes during code review

editor/src/frontend/frontend_message.rs

@@ -1,16 +1,11 @@
-use crate::document::{LayerPanelEntry, RawBuffer};
+use super::utility_types::FrontendDocumentDetails;
+use crate::document::layer_panel::{LayerPanelEntry, RawBuffer};
 use crate::message_prelude::*;
 use crate::misc::HintData;
-use crate::tool::tool_options::ToolOptions;
+use crate::viewport_tools::tool_options::ToolOptions;
 use crate::Color;
-use serde::{Deserialize, Serialize};
 
-#[derive(PartialEq, Clone, Deserialize, Serialize, Debug)]
-pub struct FrontendDocumentDetails {
-	pub is_saved: bool,
-	pub name: String,
-	pub id: u64,
-}
+use serde::{Deserialize, Serialize};
 
 #[remain::sorted]
 #[impl_message(Message, Frontend)]

editor/src/frontend/mod.rs

@@ -1,3 +1,6 @@
-pub mod frontend_message_handler;
+pub mod utility_types;
 
-pub use frontend_message_handler::{FrontendMessage, FrontendMessageDiscriminant};
+mod frontend_message;
+
+#[doc(inline)]
+pub use frontend_message::{FrontendMessage, FrontendMessageDiscriminant};

editor/src/frontend/utility_types.rs

@@ -0,0 +1,8 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(PartialEq, Clone, Deserialize, Serialize, Debug)]
+pub struct FrontendDocumentDetails {
+	pub is_saved: bool,
+	pub name: String,
+	pub id: u64,
+}