Add Prettier as a dev dependency and add two format commands

Author: arqunis

package-lock.json

@@ -6,7 +6,9 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "format": "prettier src --write",
+    "format-check": "prettier src --check"
   },
   "browserslist": [
     "since 2019 and fully supports es6-module, not dead"
@@ -20,6 +22,7 @@
     "vite": "^7.1.7"
   },
   "devDependencies": {
-    "@types/node": "^24.6.1"
+    "@types/node": "^24.6.1",
+    "prettier": "^3.6.2"
   }
 }