Add `min_date` and `max_date` to `DatePaginator`

[joshuadavidthomas]

Similar to #7, it'd be nice if regardless of the order of the object_list, that there was two properties for the min and max date of a paginator.

There's already a bunch of duplicated logic in the paginator methods dealing with this anyway, should be consolidated.

django-twc-toolbox/src/django_twc_toolbox/paginator.py

Lines 45 to 53 in 7fb68cb

	if isinstance(self.object_list, QuerySet): # type: ignore[misc]
	first_obj = self.object_list.first()
	last_obj = self.object_list.last()
	else:
	first_obj = self.object_list[0]
	last_obj = self.object_list[-1]
	first_date = getattr(first_obj, self.date_field)
	last_date = getattr(last_obj, self.date_field)

django-twc-toolbox/src/django_twc_toolbox/paginator.py

Lines 170 to 178 in 7fb68cb

	if isinstance(self.object_list, QuerySet): # type: ignore[misc]
	first_obj = self.object_list.first()
	last_obj = self.object_list.last()
	else:
	first_obj = self.object_list[0]
	last_obj = self.object_list[-1]
	first_date = getattr(first_obj, self.date_field)
	last_date = getattr(last_obj, self.date_field)