Refactor/trpc

[jthrilly]

This PR contains a fairly significant update to the tRPC implementation, based on things I have learned since the initial attempt.

Specifically:

• Implements a RedirectWrapper component under the root layout. This client side component calculates if a redirection is needed based on the path (which is now available via useRouter, meaning no middleware header injection is required). This solves the infinite update depth errors, and allows us to use the router for navigation again.
• Removes all use of window.location in favour of router methods.
• Reimplements the setup metadata functionality to consolidate all behaviour within the tRPC router. Attempts to force revalidation to trigger root layout re-render.
• Uses this endpoint to verify the expired status of the setup during the onboarding flow.
• Significantly improves the SessionProvider by correctly setting the initialData for the client side query, and refreshing the router when the session changes to null from having previously been defined (allowing the app to redirect to login across multiple tabs).

It also makes several other quality of life changes:

• Removes all use of process.env in favour of our environment helper
• Adds a useZodForm hook which provides better ergonomics for working with zod + react-hook-form
• Adds a usePrevious hook, which allows you to track the previous value of a state item or prop, which can be used inside of useEffect for comparing.
• Adds onDelete: Cascade to several of our models, meaning that relations won't be invalidated by deleting various entities.
• Updates the seed script to work correctly, including setting a valid default admin password.
• Refactor the route redirection on the onboarding wizard to work more reliably.

I'm going to branch off of this now and do some refactoring of the current client-side data fetching that is going on.