add prettier formatter

.prettierrc.mjs

@@ -0,0 +1,12 @@
+/** @type {import("prettier").Config} */
+export default {
+  plugins: ["prettier-plugin-astro"],
+  overrides: [
+    {
+      files: "*.astro",
+      options: {
+        parser: "astro",
+      },
+    },
+  ],
+};

package.json

@@ -22,5 +22,9 @@
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "tailwindcss": "^3.4.16"
+    },
+    "devDependencies": {
+        "prettier": "^3.4.2",
+        "prettier-plugin-astro": "^0.14.1"
     }
 }