new command to analyze common properties and statements

[nichtich]

See https://lucaswerkmeister.github.io/wikidata-ontology-explorer/, e.g.

SELECT ?property ?propertyLabel ?count WITH {
  SELECT ?property (COUNT(DISTINCT ?statement) AS ?count) WHERE {
    ?item wdt:P279* wd:Q6423319 ;
          ?p ?statement.
    ?property a wikibase:Property;
              wikibase:claim ?p.
    FILTER(?property != wd:P279)
  }
  GROUP BY ?property
  ORDER BY DESC(?count)
  LIMIT 15
} AS %results WHERE {
  INCLUDE %results.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}
ORDER BY DESC(?count)

could be applied to either classes or to instances (-i) with typical properties (-a) or typical statements (-A). Output formats: default (colore), csv, json