Add prettier

Author: jakubno

package.json

@@ -17,7 +17,8 @@
     "@typescript-eslint/parser": "^6.7.2",
     "eslint": "^8.57.1",
     "eslint-plugin-unused-imports": "^3.0.0",
-    "@stylistic/eslint-plugin-ts": "^1.6.2"
+    "@stylistic/eslint-plugin-ts": "^1.6.2",
+    "prettier": "^3.6.2"
   },
   "engines": {
     "pnpm": ">=9.0.0 <10"