chore: prettier ignore file generated by napi-rs (#4661)

.prettierignore

@@ -15,3 +15,9 @@ packages/backend/server/src/schema.gql
 packages/frontend/i18n/src/i18n-generated.ts
 packages/frontend/graphql/src/graphql/index.ts
 tests/affine-legacy/**/static
+
+# auto-generated by NAPI-RS
+# fixme(@joooye34): need script to check and generate ignore list here
+packages/backend/storage/index.d.ts
+packages/frontend/native/index.d.ts
+packages/frontend/native/index.js