Upgrade from tanstack query v4 to tanstack query v5

[JulianKingman]

It would be nice to upgrade to tanstack query v5. Also, WorkOS widgets require tanstack query v5, so for my project it's a requirement. If there's no objection, I'll put together a PR, so I can benefit the community as well :)

This will affect many (but not all) files that make use of tanstack query, mostly small changes with no breaking functionality, with some larger refactors, but should still be non-breaking. There's migration documentation here: https://tanstack.com/query/latest/docs/framework/react/guides/migrating-to-v5#new-hooks-for-suspense

[danny-avila]

Perfectly fine with this, any help towards this is appreciated!