Add support for protocols

[maldoinc]

Allow injection of types based on protocols. Services can declare themselves what protocol they support and the container can then perform autowiring based on that.

class SupportsFoo(Protocol):
    def foo(self) -> str:
        pass


@container.register(supports=SupportsFoo)
class FooBar:
    def foo(self):
        return "bar"

Requesting SupportsFoo will have FooBar injected.