chore: establish formatting baseline and verification scripts

package.json

@@ -5,7 +5,12 @@
   "scripts": {
     "dev": "vite --host 0.0.0.0",
     "build": "vite build",
-    "preview": "vite preview --host 0.0.0.0"
+    "preview": "vite preview --host 0.0.0.0",
+    "format": "prettier --write \"src/**/*.{js,jsx,css,md}\" \"tests/**/*.js\" vite.config.js",
+    "format:check": "prettier --check \"src/**/*.{js,jsx,css,md}\" \"tests/**/*.js\" vite.config.js",
+    "predev": "npm run format",
+    "prebuild": "npm run format",
+    "test": "node --test tests/*.test.js"
   },
   "keywords": [],
   "author": "",
@@ -16,6 +21,7 @@
     "three": "^0.180.0"
   },
   "devDependencies": {
+    "prettier": "^3.9.10",
     "vite": "^6.4.3"
   }
 }