Setup doc for React router v7 (new Remix) users

[Rafi993]

It would be awesome if we can have setup doc for React router v7 (the new Remix) users similar to Nextjs and Vite one

[djhi]

Definitely. In the mean time, you can refer to https://marmelab.com/react-admin/Remix.html. Except for the imports, all information there should apply. I you feel like contributing, open a PR by adapting this guide.