Are there documentation examples for server functions?
getServerTime example from https://tanstack.com/router/latest/docs/framework/react/start/server-functions#server-function-context triggers a Invariant failed: createServerFn must be called with a function that is marked with the 'use server' pragma. error. Is there an example app somewhere in the docs showing the correct use of server functions?
For context, I'm calling getServerTime from a react hook. My hope is to write a darkMode cookie eventually!
