Create WIKIDATAQUERY function for SPARQL

[nichtich]

See https://www.linkedin.com/pulse/importing-data-google-spreadsheet-using-sparql-kingsley-uyi-idehen for how to use SPARQL in Google spreadsheets. SPARQL queries tend to be quite long e.g.

=WIKIDATAQUERY("SELECT ?item ?itemLabel { ?item wdt:P31 wd:Q146 . SERVICE wikibase:label { bd:serviceParam wikibase:language "en" } }")

So some additional query rewriting would be nice, e.g.

=WIKIDATAQUERY("?item ?itemLabel { ?item wdt:P31 wd:Q146 }", "en")