export user-friendly type definition for HookSafeActionFn and similars

[aleclofabbro]

useHookFormAction needs to be passed a server action, typically created with proper factories ( e.g. createSafeActionClient(...).schema(...).action(...) )
that works just fine when directly importing the server action in a client component.
However, I wonder how to define a safeActon property of a client component using useHookFormAction in a more agnostic scenario (e.g. a component library) where, for instance only the input schema, and return type is known
At the moment I defined a utility type as

export type simpleHookSafeAction<inputSchema extends ZodType, returnType> = HookSafeActionFn<
  unknown,
  inputSchema,
  _any,
  ValidationErrors<inputSchema>,
  unknown,
  void | returnType
>

so that I can define safe-action properties as simple as

type ClientComponentProps = {
  saveUserSafeAction: simpleHookSafeAction<userFormSchema, { newUserId: string }>
} 

I see that HookSafeActionFn and related SafeActionResult have many generics, and can't understand the meaning and purpose of all of them, and my solution solves a very narrow use-case (that's enough for me, so far at least ...)

It would be very handy to have next-safe-action library to export various utility types to easily define safe-action types in different flavours, for component consumption