New overlay system that reimplements how overlays are drawn (#418)

* New overlay system that reimplements how overlays are drawn

* Fix overlay message declaration

* Fix small mistake

* WIP (broken) changes to plumb the overlay document

* Fix confusion over messaging system architecture

* Removed log

* Overlay system working

* (broken) WIP overlay association

* Finish the overlay system (except test failure)

* Change back IDs in test

* Fixed test, but stilled fails due to revealed real problem with layer reordering selection

* Disable broken test that has a bug in issue #444

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

.vscode/settings.json

@@ -30,6 +30,7 @@
 	// Rust Analyzer config
 	"rust-analyzer.experimental.procAttrMacros": true,
 	"rust-analyzer.cargo.target": "wasm32-unknown-unknown",
+	"rust-analyzer.checkOnSave.command": "clippy",
 	// ESLint config
 	"eslint.format.enable": true,
 	"eslint.workingDirectories": [