Add temporal_resolution field

[mjanez]

1. ISO 8601: https://www.w3.org/TR/xmlschema11-2/#duration

duration is a datatype that represents durations of time. The concept of duration being captured is drawn from those of [ISO 8601], specifically durations without fixed endpoints. For example, "15 days" (whose most common lexical representation in duration is "'P15D'") is a duration value; "15 days beginning 12 July 1995" and "15 days ending 12 July 1995" are not duration values. duration can provide addition and subtraction operations between duration values and between duration/dateTime value pairs, and can be the result of subtracting dateTime values. However, only addition to dateTime is required for XML Schema processing and is defined in the function ·dateTimePlusDuration·.

[mjanez]

Add in feature/dcat-ap-schemas update, without validator:

ckanext-schemingdcat/ckanext/schemingdcat/schemas/geodcat_ap/es_geodcat_ap_2.yaml

Lines 2027 to 2037 in 4b5c4b7

	##TODO: temporal_resolution
	## Add codelist or validator to check ISO 8601: http://www.google.com/url?q=http://www.w3.org/TR/xmlschema11-2/%23duration&sa=D&source=editors&ust=1677159514756434&usg=AOvVaw3Xyh6wn0UVcwFCy3-_9P8i
	- field_name: temporal_resolution
	label:
	en: Temporal resolution
	es: Resolución Temporal
	help_text:
	en: 'Minimum time period resolvable in the dataset,<a href="http://www.w3.org/TR/xmlschema11-2/%23duration&sa=D&source=editors&ust=1677159514756434&" target="_blank" rel="noopener">[ISO 8601]</a>.'
	es: 'Período de tiempo mínimo resoluble en el conjunto de datos, ISO 8601., <a href="http://www.w3.org/TR/xmlschema11-2/%23duration&sa=D&source=editors&ust=1677159514756434&" target="_blank" rel="noopener">[ISO 8601]</a>.'
	help_allow_html: True
	form_group_id: standards