feat(viewer): add Vue-based HUD, ops strip, and history window

apps/viewer/src/main.ts

@@ -1,5 +1,7 @@
-import "./style.css";
-import { GameViewer } from "./GameViewer";
+import "./styles/index.css";
+import { createApp } from "vue";
+import App from "./App.vue";
+import { viewerPinia } from "./ui/stores/pinia";
 
 const root = document.querySelector<HTMLDivElement>("#app");
 
@@ -7,5 +9,6 @@ if (!root) {
   throw new Error("Missing #app root element");
 }
 
-const viewer = new GameViewer(root);
-void viewer.start();
+createApp(App)
+  .use(viewerPinia)
+  .mount(root);