Should `Field` and `FormField` also serialise value?

[eigenein]

At the moment, we simply assign the value:

combadge/combadge/support/http/markers/request.py

Lines 211 to 214 in 8b60b1b

	def __call__(self, request: ContainsPayload, value: Any) -> None: # noqa: D102
	if request.payload is None:
	request.payload = {}
	request.payload[self.name] = value.value if isinstance(value, Enum) else value

1. Should we maybe serialize value as well?
2. If yes, should we also deal with the code duplication across Payload, Field, FormData, and FormField?