Format and lint code

## Description

It is a good idea to make sure that your code is formatted based on a single standard throughout your project. There are two packages that can usually help you with that:

- `prettier` is a formatter that makes sure that your code is formatted the same way throughout. For example all files use `tab` characters for indenting.
- `eslint` is a linter that checks the code for common coding mistakes and warns you if it encounters any of them. It can also automatically fix some mistakes.

## Acceptance criteria
- [ ] Code is formatted using prettier config `.prettierrc`
- [ ] Code is lintted using eslint config `.eslintrc`

## Guidance 🧭

Check the [code quality guide](https://github.com/CodeYourFuture/Full-Stack-Project-Assessment/tree/main/guides/code-quality) for steps on how to format and form