Allow for Params generic to be type safe

[lifeiscontent]

using something like https://github.com/sandulat/routes-gen it provides a type safe routes.d.ts file with a RouteParams interface mapping to all the routes in a remix app, it would be nice to be able to use useParams<RouteParams['/todos/:id']> but this forces the useParams hook to return {id?: string} which to my knowledge is not possible for this given route.