Infer state defaults from typing

[JamesArruda]

Typing ResourceState and setting the default are most commonly going to be duplicated. This is similar for State values and the valid_type argument.

This looks more complicated:

class CashRegister(UP.Actor):
    waiting_customers = UP.ResourceState[simpy.Store](default=simpy.Store)
   number_served = UP.State[int](default=0, valid_types=int)

than this:

class CashRegister(UP.Actor):
    waiting_customers = UP.ResourceState[simpy.Store]()
    number_served = UP.State[int](default=0)

Any changes made here would have to allow for union types that would still require a single default value.

[JamesArruda]

There's also a frustrating problem where:

class Cashier(UP.Actor):
     a_queue = UP.ResourceState[UP.SelfMonitoringStore]()
   
    def q_help(self) -> None:
        self.a_queue._record() # <- type hinter fails

The type hinting will think a_queue is of type Store or Container and complain about using _record() (which you may want to do if you're doing things to items directly).

[JamesArruda]

This may have to wait until PEP 718.