Add structured Mismatch class

[JP-Ellis]

Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Description

Replace the generic dict[str, Any] returned by a mismatch with a more informative class:

pact-python/src/pact/v3/pact.py

Lines 407 to 412 in 5e52872

	@property
	def mismatches(self) -> list[dict[str, Any]]:
	"""
	Mismatches between the Pact and the server.
	"""
	return self._mismatches

Has this been requested on Canny?

No response

Motivation

A new class would facilitate the programmatic handling of mismatches, and avoid the use of Any.

Have you tried building it?

No response

Self-service

• I'd be willing to contribute this feature to Pact Python myself.