Implement anchor and handle point rendering with the Path Tool (#353)

* Implement Path Tool

* Draw a red rectangle where the first point on the shape is

* Correctly render anchors, handles, and connecting lines

* Fix drain() which can panic

* Refactor frontend messages to work as return values not callbacks

* Reduce the number of unnecessary frontend updates

* Fix stack overflow by using a loop

* Group Document Render calls and put them at the end

* Speed hacks for dirtification

* Add performance

* Bunch folder changed updates

* Add triggers to redraw overlays to movement_handler

* Polish the pixel-perfect rendering of vector manipulators

* Restore scrollbars that were disabled

* Cleanup

* WIP Add shape outline rendering

* Fix compiling

* Add outlines to selected shapes

* Fix outlines rendering over handles and anchors

* Fix dirtification

* Add a comment

* Address code review feedback

* Formatting

* Small tweaks

Co-authored-by: Oliver Davies <oliver@psyfer.io>
Co-authored-by: Dennis Kobert <dennis@kobert.dev>

editor/src/global/global_message_handler.rs

@@ -1,8 +1,9 @@
 use crate::message_prelude::*;
+use serde::{Deserialize, Serialize};
 use std::collections::VecDeque;
 
 #[impl_message(Message, Global)]
-#[derive(PartialEq, Clone, Debug, Hash)]
+#[derive(PartialEq, Clone, Debug, Hash, Serialize, Deserialize)]
 pub enum GlobalMessage {
 	LogInfo,
 	LogDebug,