Remove extraneous-import issues on frontend

[nina-dk]

Currently, we're importing some types from @prisma/client and functions from react-router without having those packages listed as dependencies on the front-end package.json file. Adding them causes issues, especially with prisma. I tried it and it no longer recognized User, for example, as an exported member. I think the ideal solution would be to export the required types from the backend and import them from there, or figure out a way to have a shared types.ts. For now, I've left a warning from ESlint