added prettier

package.json

@@ -7,6 +7,7 @@
     "start": "tauri dev",
     "dev": "tauri dev",
     "build": "tauri build",
+    "format": "prettier --write --plugin-search-dir=. .",
     "svelte:dev": "vite dev",
     "svelte:build": "vite build",
     "svelte:preview": "vite preview",
@@ -26,6 +27,8 @@
     "daisyui": "^2.20.0",
     "postcss": "^8.4.14",
     "postcss-load-config": "^4.0.1",
+    "prettier": "^2.7.1",
+    "prettier-plugin-svelte": "^2.7.0",
     "sass": "^1.53.0",
     "svelte": "^3.49.0",
     "svelte-add": "^2022.7.2-2.0",