Adds vitetest

app/package.json

@@ -9,6 +9,7 @@
     "build": "cross-env FOR_EMBEDDED=true vite build",
     "build:web": "cross-env FOR_EMBEDDED=false vite build --mode WEB",
     "preview": "vite preview",
+    "test": "vitest",
     "check": "svelte-check --tsconfig ./tsconfig.json",
     "format": "prettier --plugin-search-dir . --write ."
   },
@@ -32,7 +33,8 @@
     "typescript": "^5.3.3",
     "vite": "^5.0.12",
     "vite-plugin-compression": "^0.5.1",
-    "vite-plugin-singlefile": "^1.0.0"
+    "vite-plugin-singlefile": "^1.0.0",
+    "vitest": "^1.3.1"
   },
   "dependencies": {
     "nipplejs": "^0.10.1",