AbortSignal in createServerFn call signature

[phuctm97]

Allow to input an AbortSignal when calling a server function

Obvious use case is to call server function in route loader and pass the loader's abortController.signal to it.

[ryanagillie]

+1! Using with TanStack Query and it would be nice to be able to pass AbortControllers from the queryFn to stop in flight requests on unmount