Serve the demo artwork in each build (#1494)

* Serve local demo artwork

* Disable restricted import lint

* Revert

* Switch approach to vite-multiple-assets plugin

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

frontend/src/wasm-communication/messages.ts

@@ -522,7 +522,9 @@ export class TriggerLoadAutoSaveDocuments extends JsMessage {}
 export class TriggerLoadPreferences extends JsMessage {}
 
 export class TriggerFetchAndOpenDocument extends JsMessage {
-	readonly url!: string;
+	readonly name!: string;
+
+	readonly filename!: string;
 }
 
 export class TriggerOpenDocument extends JsMessage {}