chore: add prettier dep

Author: sxzz

package.json

@@ -66,6 +66,7 @@
     "monaco-volar": "^0.3.0",
     "onigasm": "^2.2.5",
     "path-browserify": "^1.0.1",
+    "prettier": "^2.8.8",
     "rimraf": "^3.0.2",
     "sucrase": "^3.32.0",
     "typescript": "^5.1.3",