Upgrade Eslint and add Prettier

[ewan-escience]

Upgrade Eslint and add Prettier

Changes proposed in this pull request:

• Upgrade Eslint from 8.46.0 to 9.9.0 in the frontend
• Setup Prettier for the frontend

How to test:

• docker compose down --volumes && docker compose build --parallel && docker compose up --scale data-generation=1
• Check if everything still works
• Read the added documentation in frontend/README.md
• Check out the config file frontend/eslint.config.js (and the removed file frontend/.eslintrc.json)
• Check out the config files frontend/.prettierrc and frontend/.prettierignore

Closes #1198 Related to #915

PR Checklist:

• [ ] Increase version numbers in docker-compose.yml
• [x] Link to a GitHub issue
• [x] Update documentation
• [ ] Tests

[ewan-escience]

@dmijatovic can you fix the broken workflow? Maybe this or this can help.

[dmijatovic]

@ewan-escience Unfortunately next eslint config does not support eslint v9.

We should wait for a new release of eslint-config-next plugin that supports eslint v9.x.

[ewan-escience]

Closing this, as this branch will be very behind when Next.js will support Eslint 9.