Allow useGlobalAction callback to take no arguments

[MillanWangGadget]

• UPDATE
  • Some Gadget template apps have type errors because they have useGlobalAction and no parameter in the callback.
    • Expected 1-2 arguments, but got 0
  • This actually works and should be allowed by the type

This will no longer have a type error with the default code snip

[danroberts]

It seems to me that we should be covering this case in react/src/utils when we do:

 * The return value of a `useAction`, `useGlobalAction`, `useBulkAction` etc hook.
 * Includes the data result object and a function for running the mutation.
 **/
export type ActionHookResult<Data = any, Variables extends AnyVariables = AnyVariables> = RequiredKeysOf<Variables> extends never
  ? [
      ActionHookState<Data, Variables>,
      (variables?: Variables, context?: Partial<OperationContext>) => Promise<ActionHookState<Data, Variables>>
    ]
  : [
      ActionHookState<Data, Variables>,
      (variables: Variables, context?: Partial<OperationContext>) => Promise<ActionHookState<Data, Variables>>
    ];
    ```
    
    maybe there is something wrong with that type?

[MillanWangGadget]

It seems to me that we should be covering this case in react/src/utils when we do:
maybe there is something wrong with that type?

Good call. It turns out that the Record<string,never> that global actions pass into ActionHookResultwas causing the callback type to have a mandatory variables argument parameter. Since globalActions cannot have required params, I've updated the return type to always have an optional variables argument

[MillanWangGadget]

Note that I tried doing a ternary chain here, but this causes a lot of type errors