Add spatial widget to generate the BBox

[mjanez]

Update spatial field (snippet_form) to generate an interactive BBox, in order to facilitate the work of metadata generation.

ckanext-scheming/ckanext/scheming/ckan_geodcatap.yaml

Lines 642 to 652 in 3c165fb

	- field_name: spatial
	label:
	en: Bounding Box
	es: Extensión espacial
	form_snippet: json.html
	display_property: dct:spatial
	form_placeholder: '{"type": "Polygon", "coordinates": [[[-18.273563, 27.549025], [4.440455, 27.549025], [4.440455, 43.855133], [-18.273563, 43.855133], [-18.273563, 27.549025]]]}'
	help_text:
	en: '<a href="https://geojson.io" target="_blank">Draw and edit BBox:</a> Only "geometry" dict with "type" and "coordinates" elements. More information at <a href="https://geojson.org/geojson-spec.html#bounding-boxes" target="_blank">GeoJSON bounding boxes</a>.'
	es: '<a href="https://geojson.io" target="_blank">Dibuja y edita el BBox:</a> Solo es necesario el diccionario "geometry" con los elementos "type" y "coordinates". Más información en <a href="https://geojson.org/geojson-spec.html#bounding-boxes" target="_blank">GeoJSON bounding boxes</a>.'
	help_allow_html: True

More info: dbca-wa/ckanext-dbca#1 ckan/ckanext-spatial#93