:sparkles: Support Methods

[tombulled]

Example of roughly what is desired:

from dataclasses import dataclass
from typing import Callable

from mediate import middleware

CallNext = Callable[[str], None]

@dataclass
class Dog:
    name: str

    def _log_message(self, call_next: CallNext, message: str) -> None:
        print(f"[INFO] Dog {str(self.name)!r} saying message {message!r}")

        return call_next(message.upper())

    @middleware(_log_message)
    def say(self, message: str) -> None:
        print(message)

dog = Dog(name="Sam")

>>> dog.say("I like sticks")
[INFO] Dog 'Sam' saying message 'I like sticks'
I like sticks