feat: 🎸 add perfectionnist in bonus section

Author: MatthysDev

challenges/ecosystem/02.md

@@ -276,6 +276,7 @@ In our case `cargo_capacity`, `cost_in_credits` are not using `camelCase` and we
 ### Avoid data layer issues
 
 - [ ] Install [TanStack Query ESLint plugin](https://tanstack.com/query/latest/docs/eslint/eslint-plugin-query).
+- [ ] Install [Perfecionist](https://perfectionist.dev/) to enforce a consistent code style across your codebase.
 
 ### Share your settings with your team