Add annotating decorator

[emptybutton]

Need to implement the following functionality for centralized annotating:

...

Send = Callable[str, bool]
User = type(name=str, age=int)


@Is[Send]
def send_via_email(message: str) -> bool:
    ...


@Is[User]
@obj
class chingzhenmen:
    name = "Chingzhenmen"
    age = 24

    def do_chingzhenmen(self) -> ...:
        ...


# To avoid:
# send_via_email: Send
# chingzhenmen: User