Vue initialization and FloatingMenu codebase refactoring and cleanup (#649)

* Clean up Vue initialization-related code

* Rename folder: dispatcher -> interop

* Rename folder: state -> providers

* Comments and clarification

* Rename JS dispatcher to subscription router

* Assorted cleanup and renaming

* Rename: js-messages.ts -> messages.ts

* Comments

* Remove unused Vue component injects

* Clean up coming soon and add warning about freezing the app

* Further cleanup

* Dangerous changes

* Simplify App.vue code

* Move more disparate init code from components into managers

* Rename folder: providers -> state-providers

* Other

* Move Document panel options bar separator to backend

* Add destructors to managers to fix HMR

* Comments and code style

* Rename variable: font -> font_file_url

* Fix async font loading; refactor janky floating menu openness and min-width measurement; fix Vetur errors

* Fix misaligned canvas in viewport until panning on page (re)load

* Add Vue bidirectional props documentation

* More folder renaming for better terminology; add some documentation

frontend/src/state-providers/workspace.ts

@@ -0,0 +1,22 @@
+/* eslint-disable max-classes-per-file */
+import { reactive, readonly } from "vue";
+
+import { Editor } from "@/wasm-communication/editor";
+import { UpdateNodeGraphVisibility } from "@/wasm-communication/messages";
+
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
+export function createWorkspaceState(editor: Editor) {
+	const state = reactive({
+		nodeGraphVisible: false,
+	});
+
+	// Set up message subscriptions on creation
+	editor.subscriptions.subscribeJsMessage(UpdateNodeGraphVisibility, (updateNodeGraphVisibility) => {
+		state.nodeGraphVisible = updateNodeGraphVisibility.visible;
+	});
+
+	return {
+		state: readonly(state) as typeof state,
+	};
+}
+export type WorkspaceState = ReturnType<typeof createWorkspaceState>;