add a high value label

[pvgenuchten]

a service which assigns (or revokes) a 'high value' tag, based on a set of criteria

[pvgenuchten]

As discussed today, In upcoming esdac meeting we will suggest a name change for 'high value'; action @tomreznik

[pvgenuchten]

the great project created an assessment of high priority and high value datasets at https://www.greatproject.eu/dataset-data-services-inventory/, could be interesting to understand their approach, and/or use some of their results